Disclosure: I don't work for Acer or have any affiliation with them.
I thought as a change of pace, I'd detail my wonderful purchase experience with Acer. I purchase this Acer Aspire a week ago.
+ AMD Quad Core Processor A6-3420M turbo boost to 2.4 GHZ
+ AMD Radeon 6520G + 7670M 1GB
+ 15.6" HD LED
4 GB DDR3
320GB 5400 RPM HD
The only bad thing is I bought it for $449, and currently its on sale for $399.
After using it for a week, I can say nothing but good things for this laptop. Its very thin and light. A little bit thicker than a dime on its side. But, its powerful enough to handle all your blizzard games (Diablo 3, Starcraft 2, WoW, etc). Its running fast.
For best performance for D3, you will want to copy the D3 game onto a 16 GB flash drive and run it off of that for fastest data access times.