For a good system drive go for a 10k rpm, this thing is fast, very fast! My friend the IT manager (Had the IC7 Max Mobo i mentioned in another post) absolutely swears by them, he has installed them on all the PC’s in his office too.
I’m defiantly getting one soon. My 2 IDE's are slowing my machine down, fine for storage though; they are Maxtor 40gb and IBM 120gb.