well, my personal choice would be a more normal receiver with hdmi, optical and a subwoofer pre-out rca jack.... and to get a powered subwoofer (in the future if needed) instead of going with the more limited stereo receiver you wanted to. i'd also connect via optical.
but thats your choice, i've told you the limitations already.
if you wanted to go with those speakers and the stereo receiver as discussed then all you'd need is speaker wire and a way to connect the system up to your source. a 3.5mm stereo male to 2x rca red+white splitter cable would work. if you wanted to use your subwoofer and your old control box for it has 3.5mm or 2xrca input then i'd get a 3.5mm splitter to put on your pc output... and then either use a 3.5mm/3.5mm cable or 3.5mm/2xrca cable depending on what kind of input it has.