Hmm--this could be misleading if it suggests the 7k500 will play Farcry faster ( frames per second) because it does more IO/s than another modern drive. I play FEAR on a 10kIV and a 7K250 (backup drive) in the same system. The Head to Head shows the SCSI with the better IO but fps are indeed equal. FPS are influenced by CPU , FSB and video card performance. If you tested game fps as part of the drive reviews you would soon not bother.
On the "feel good" matter, access times sure count more than you credit for single user average use performance , eg, web surfing, loading windows, mail , etc. I know I am beating the deceased mare here but I will take the 10k over ANY IDE for those purposes. I have recently installed the 10kV and now, honestly, I understand the phrase "a god in the machine."