The perpendicular drives are very nice, in the real world you wouldn't notice much, if any, performance difference between that and a raptor. Well, aside from the noise, of course. I stuck a nice expensive raptor into a spare machine, got so tired of listening to drive access. Went back to a quieter, bigger, and much less expensive seagate and vastly prefer that.
Look at the throughput for the 7200.11 seagate.
http://www.tomshardware.com/charts/3...mance,658.html