For what it's worth here is my opinion. Currently I have 2 Seagate Barracuda's 10k SCSI and a single WD Raptor !0k. The Sata drives are much more quiet than the SCSi, on the other hand I bought bot SCSI (refurbed) from Overstock.com, just make sure there is an adapter included for a drive you might want. These drives cost me $50 a piece, and luckily I got a scsi card for free, wish I had a raid card though. The Raptor of course costs around $150. More info. about the Raptor, it is hot swappable, it also has NCQ (native command queing), which is basically TCQ (Tagged Command Queing) which is part of most SCSI drives. The only resaon I have all the drives in a single PC is that I occasionally attempt modifactions to my pc's or cases which result in destruction, I guess I just have to learn the hard way,, lol. Personally I prefer buying refurb (aside from MOBO) because there is aways manufacturer warranties. The first Raptor I got had a head crash and it was extremely easy to get a replacement. Hope this helps a bit, and NewEgg is definetely a great place to buy from. I have bout 90% of my PC equipment from them