Hi guys, thanks for all the suggestions. The reason why I'm looking specifically for Velociraptors (as opposed to SSDs + Blacks) is due to:
Current boot drive (250GB Blue) is very old and starting to show errors.
This same drive contains separate partition for all of my games.
Looking for direct clone replacement (equal or higher capy).
500GB SSD is out of my budget.
SSD+HDD means only OS performs but games still load from slow drive.
WD drives have never let me down, unprecedented reliability. Bought a Seagate one as backup + Time Machine because it was cheap. Dead within half a year; claimed RMA and sold it. I know they have a 15k drive but not willing to take risk.
So, Velociraptors look like an attractive compromise between reliability, cost, performance and capacity right now.
If anyone can propose a suitable solution to my current situation, I'd really appreciate it.