Looking for a great gaming computer under $700

[latvianxpert]

I'm looking for a pretty good gaming computer that could run Battlefield 3 on high and Skyrim on high too. I've been doing a lot of researching lately but I have no idea which is the best for the money. I'd like for it to not get easily outdated, maybe last for 3-4 years or so.
I'd like 6-8 GB of ram.
Quad core.
Those are basically the only requirements I have.

 

[Komomu]

http/www.amazon.com/Acer-Aspire-V3-571G-6602-15-6-Inch-Midnight/dp/B0085H63TC/ref=sr_1_1?ie=UTF8&qid=1344625442&sr=8-1&keywords=acer+v3-571g-6602



Core i5-2450m, GT630m 4gb ddr3

for $20 you can add 4gb more so it'll be 8gb and better at gaming than the gt555m and much better than the 7730m

http/www.amazon.com/Kingston-ValueRam-PC3-10600-KVR1333D3S9-4G/dp/B002XN3OL4/ref=sr_1_1?s=electronics&ie=UTF8&qid=1344625581&sr=1-1&keywords=notebook+ram