Originally Posted by OhSnapWord
Be careful with the Caviar Black drives. I had two of them in a RAID 0 and one drive crapped out. While RAID 0 is fast, make sure you have a backup of your bulk storage.
This is just one user - I've owned dozens of WD Blacks and never had an issue. I've had Seagates that died, Samsungs, Maxtors, etc. Fact is, they're hard drives. They fail from time to time.
There's nothing wrong with the WD Blacks - though honestly for storage duties you'd be fine with either a WD Blue or even a green. Once you get above 1TB, speed doesn't matter as much - some of the 7200 RPM 1TB drives are faster than the old 300GB Raptors which spin at 10,000 RPM.
There's no reason to put a storage drive in RAID 0 - you'd be adding speed and capacity, but no data redundancy. RAID 1 would be better if you're concerned about data safety.
An SSD + HDD combo is respectable, and works fine - the PC I use at work has a 120GB SSD and a 750GB storage drive (Western Digital Black too).
If you can afford it, go for it.