I am currently running
1x WD 640 GB drive because when they came out they were very fast (4kb sectors if I remember correctly) (it is my boot drive)
2x WD 1500 GB drives because they were the biggest I could get at the time
3x WD 2000 GB drives because I lost 4TB of data on my 2TB Seagates
Using a custom 6x sata power cable I made for my corsair PSU.
that is using all my 6 internal sata ports
1x WD 2000 GB external passport drive
I am running out of space
probably getting another WD 2000 GB external drive.
all but the 640 GB drives are running ExFAT with