$60 buys you the FASTEST 7200 RPM drive on the market, and in fact the Seagate Beracuda 500GB 7200.12 actually has a FASTER sustained read than BOTH the RaptorX and VelociRaptor.
I own one for my OS drive and it's not only totally silent, but only half the thickness of a standard drive. My Raptor which is my FSX drive annoys the **** out of me. Too damn loud.
Seagate 7200.12 = 108MB/s average read.
RaptorX 10,000 = 72MB/s average read
VelociRaptor 10,000 = 103MBs/s average read