WD Raptor

I'm really considering buying a WD Raptor.  Not the 150GB one with CARBON NANOTUBES, mind you, but the smaller 74 or 36 GB variaties, depending on what prices I can find.  The idea here is I want to put my OS on it to decrease my boot time, but I'm not even sure that's going to help.  Should this noticeably decrease the time it takes my computer to boot?
Also the best deal I can find on one of these is just less than 100 USD at newegg for the 36 GB one.  What other good websites besides Newegg and Zipzoomfly should I check, and are there any other good hard drives that are 10K RPM?

Fuck that. Build yourself a RAID 0 or RAID 10 made of 15k RPM SCSI drives. Make sure to use hardware RAID, 3ware 95xx or 96xx controllers are adequate. LSI is good as well from what I've heard.

Then install Linux and use the FCACHE kernel patch. http://gentoo-wiki.com/HOWTO_FCache

Your system will probably boot in mere seconds.