I can tell you I am not the least bit impressed with raptors
I have had a number die on me and I see relatively zero difference in speed.
How do I know that because I have windows 7 Ultimate 64 bit,
loaded on a 78 gig velociraptor and the exact same on a seagate 80 gig sata II.
There really isnt any appreciable difference in loading to desktop.
Windows Experience scores the 2 systems exactly the same
with the harddrives scoring 5.9