i just got a sony str-dn540 receiver for my parents since they just upgraded to a flat screen tv and needed to power two floorstanders. its a lower end model then the one you are looking at but it works alright. i've heard through the grapevine that its suggested to avoid low end sony receivers but that the high end is okay. i like my pioneer much better however considering i paid twice as much for it i'm not sure if its just the difference in tiers or if pioneer just has a better menu. to its credit the sony did have an on screen display menu instead of just the faceplate. i had to buy a pioneer elite just to get the osd so i was definitely impressed by that. the remote control was a bit annoying to enter settings mode though since i couldnt find a receiver button to select the source (i had to push the home button to get it to select the receiver as the source for the controller) but nothing too bad.
denon is generally regarded as a good brand. pioneer and yamaha are also well known and respected. sony doesnt get the good press but isnt a terrible brand either. considering that even high end receivers can have issues its hard to fault them. for example my receiver tripped a thermal overload switch on accident (its software controlled) and i had to send it in just for them to press a few buttons to unlock it (it wouldnt turn on). rather annoying since if i had the code i could do it myself. overall though considering i use it every day and have had it for at least 3-4 years i cannot complain. hopefully the sony works as good for the parents.
polk makes some decent speakers and likely you cannot go wrong with them. personally my acoustical tastes prefer klipsh bookshelves and floorstanders though. my wallet however would cry so i'm using klipsch satelites instead. from what i've seen the people at crutchfield are respected as knowing what they are talking about so the speaker matchup they provided you is likely good. afaik the monitor 70 is an older discontinued model.
one thing i see recommended that i'm not sure if i like or not is monster xp speaker wire and the monster subwoofer cable. since the speakers are only listed as 8ohm the 16awg thickness of the monster xp would work however for less than half the price you could be using 14awg from your local lowes http
/www.lowes.com/pd_303112-63374-AH14100SR_0__?productId=3701474&Ntt=speaker+wire&pl=1¤tURL=%3FNtt%3Dspeaker%2Bwire&facetInfo= which is a much better deal. also consider that if you need more than 100ft you could also go with this product for 250ft at $10 cheaper than monster cable http
/www.lowes.com/pd_81147-63374-AH16250SR_0__?productId=3727395&Ntt=speaker+wire&pl=1¤tURL=%3FNtt%3Dspeaker%2Bwire&facetInfo= personally though i'd probably get 14awg. i just bought some for some 100w tower speakers since they have 50ft runs (runs in conduit under floor so not a straight path) and need to be rated for 6ohm. see this chart for distances, ohms and speaker wire gauges.
http/faq.yamaha.com/us/en/article/live_sound/pa_systems/stagepas_300/2521/7034
edit: i have a relatively small room 13x15 and ran just two speaker wires under the floor and i had to buy two 50ft rolls (i should have bought a 100ft) so i am going to say you will probably need much more than 100ft! i did personally use monster xp myself but in retrospect i should have used the rca i bought for my parents system. monster xp doesnt give you anything superior.
as far as the subwoofer cable is concerned you can probably get a cheaper cable than that. personally i use a rocketfish and saved $10. where do you plan on putting the subwoofer? if it is more than 12ft away the cable wouldnt work and may need something longer. if you had a long run and the cable is too expensive you could make your own with shielded cable and ends like this
http/www.monoprice.com/Product?c_id=102&cp_id=10236&cs_id=1023602&p_id=2684&seq=1&format=2&utm_expid=58369800-11.KFcpHWqASSutMqNPOqaJVg.0&utm_referrer=http%3A%2F%2Fwww.avsforum.com%2Ft%2F828306%2Fdiy-subwoofer-cable with diy link here
http/www.avsforum.com/t/828306/diy-subwoofer-cable
i also see some things missing from your order. i would highly suggest routing any speakers not right in your av cabinet through the wall or ceiling with faceplates. you could buy them locally however the prices are insane so i suggest buying them online.
faceplate for use behind the avr. you can find them with different numbers of connectors on them depending on where you put the speakers. personally i use a 4 port model since my front speakers are on a desk so i dont need to run them through the walls.
faceplate for behind each speaker location.
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bannana plugs work great for these and you have your choice of single or double. personally i prefer the screw together types so there is no need for solder.
how you can connect up to the speakers with bananna clips too if you prefer however i personally just used bare wire on them and had the bananna clips on the wall end of the short speaker lead.
edit #2
just saw the reply above...
i agree that you will probably not need 150w of power (you can probably make do with a 100w per channel receiver) unless you intend to really max out the volume.
i would stay with a decent subwoofer though. i have a 450w subwoofer in a small room and while a bit overpowered a 100w is nowhere near enough for my small room let alone a larger room without getting significantly less bass response on the low end. of course it is all personal preference. i like to feel the vibration of scenes like explosions, the intro to event horizon showing the spaceship (which is awesome with a good sub!) and other such scenes which make good use of low tones.
while true that two smaller subwoofers may provide a more balanced sound it is completely up to you. if you run speaker calibration with the subwoofer (on pioneer they call it mcacc and sony calls it dcac) but basically they calculate timings to balance everything out and it works remarkably well. perhaps better with two subs but i dont have two subs to test with.
i agree with 7.1 not really being worth all the hype. a good 5.1 system has much more content, is cheaper and sounds about the same. a good 5.1/5.2 receiver is probably good enough unless you feel the need to go 7.1/7.2 route.