what surprised me by far was that the Raptor was way quieter than I expected. I used to own a hardcore scsi setup and it sounded like an old refigerator. The raptor's performance is wonderful especially for its price. If you go with an 8650 motherboard, definitely get the WD Raptor. Another thing was my old scsi setup was nasty inside... I kept it clean but that doesnt make it look any nicer wire wise, all those ribbon cables everywhere (and later on rounded ones) were a headache to organize. If you are going to be working on your system a lot, or even if you dont. the thin sata cables are much more pleasant to deal with in every way, not to menion improved airflow.