I'll vote with ferrit on this one, i have 2 raptors, and 1 just died. I had a 600 gig WD die on my late last year. I've gotten dis-illusioned on them as a brand. I'm moving to Seagate for storage drives and picked up a pair OCZ SSD's to directly replace the raptors.

With newer technologies that are in modern hard drives, they are comparible to the raptors of old. your 160 gig seagate may not have them, but spend $80 on a modern 750-1tb drive and you will see similar performance compared to a single raptor.