Yes I would wait for WD Raid Edition too, or you could just raid 5 3 x 500 Gigs (extra 1 is for recovery)
Over speed, cost and space I prefer to trust that my data will still be there in the morning! It's worth paying an extra £20 to get a few better parts and a MTBF of 1.2Million hours/136 years
http://www.wdc.com/en/products/Products.asp?DriveID=238
Iomage - Their 1Gb SCSI based Jaz drive was pants, nearly failed my degree module because of it. I'll never trust them again due this piece of rubbish. They did replace it no questions asked but after the 3rd failure I just got rid.
Seagate - I've had 2 Seagates die on me over the years. In my personal past opinion they are cheap for a reason.
Fujitsu - I used to rate these because they were very quiet and reliable. But I can only find 2.5" drives from them now and thats why I ended up looking at Western Digital RE.
http://www.KumKie.com http://bulldog.servegame.com