I'm sure you have all heard this question hundreds of times, but I'm new to steam and i'm trying to find some good games to burn my summer away with.
I currently have Portal, Half Life 2: Deathmatch, Counter Strike: Source, Garry's Mod, Day of Defeat: Source, and Torchlight
Price isn't an issue. Thanks in advance.
EDIT: My Computer Specs: Windows 7 Home Premium, Nvidia GTS 250, AMD Athlon X4 Quad, 10gb RAM