ok im in the process of ordering a hard drive. theres so many to choose from. I know maxtor,seagate,IBM,quantum.. so on each have their differences. I'm building my system for gaming and want a good HD so my questions are.. For Example say i have an IBM 75GXP 30 gig ata/100 7200rpm and a Quantum 30gig ata/100 7200rpm. the IBM is probably better but would i actually see a performance difference while im playing games. i dont care what some guy got on his benchmarks. Lastly is there a noticeable difference between ata 66 and 100..