Imo, I think it's worth. I have dv6 with A8-3500M and only 6620G but it plays LOTRO really well got an average of 40-50 fps and goes to 60+ when I'm in quest mode, ofcourse I let lotro engine to dectect the settings.
I find the CPU ok, but you need to adjust it in AMD control panel to work constantly in 1.5 ghz otherwise it will downclock it to 800mhz to save power but it will increase it when there's a demand for cpu power. I like it when is running constant 1.5 ghz no noticeable lag. I find also the CPU power helps a lot with browser games like the new C&C Tiberium Alliances.
CPU will also goes to 2.4ghz when it really need. The downside of this is you lose lot of battery life average 2-3hrs of gaming maybe less.. with CPU set to 800mhz you have like close to 6 hrs but thats only for surfing web. The good thing is you can overclock this take a look http
/www.youtube.com/watch?v=30zTM11hg7A.
I compared it with my friends I5 480M laptop and I find it no diff in CPU power for regular use.. But for gaming A8 Laptop really shines, No complain here... Just don't expect crazy game setting and you will not be disappointed.
You can also wait for the new AMD APU version Trinity.
http/www.techpowerup.com/163575/Trinity-Provides-Up-To-29-Faster-Productivity-56-Faster-Visuals-Than-Llano-AMD.html
Goodluck!