I built a PC recently (been a Mac guy for past 10 years) and have discovered the joy of gaming options. Since I'm now using Steam, D2D, et all now, I thought it would be best to buy a good 2nd drive for game storage. In the past 72 hours I bought Mass Effect 1+2, Fallout 3 GOTY and others, so space is flying by and I don't like filling up my main HDD too much.
OS: Win 7 64-bit
Main HDD: Samsung Spinpoint F3 500g
Budget: Prefer to stay $100 or under if possible.
Size: Sure, 2TB is optimal, but I'd give in if it meant a good increase in performance.