@amk-aka-phantom huh what? should I be scurred? I just fired up a dell R510 I picked up from ebay with 2x 146GB 15k cheetahs for boot and packed it with 12x2tb SATAs for storage in Raid6 for my home media server that will live in the garage. I also have a cheap little eSATA 4 bay enclosure with 4 x 2TB in a software raid 5 that has been running for about 2 years without a hitch, although it's getting close to full.
If you could attain USB 3 speeds, and not be bottle necked by the controller USB3 should, in theory, outperformance 3Gb/s SATA, but not quite up to 6Gb/s SATA. I have a kingston thumb drive that does 125MB/s in both directions which out be perfectly fine if this drive could match that.
Personally I like single platter drives for data due to less heat, quieter, and generally higher MTBF, but I usually go for what is big and cheap and raid it. What you said about never use a big HDD is just silly. I have a box at work with about 200 8-20GB drives in there that eventually I'm supposed to break out the drill and destroy, do you want them instead?
As far as this thing? Meh, I'll wait for 4TB internals. hmm 12x4TB in my R510 would be me enough room for over 1000 Blu-ray images assuming 40GB each, although across my current 250ish blu-ray images they are average out to about 25-30GB. WOohooo! hurry up 4TB internals.