The Seagate Barracuda is a SATA HDD, which proves to be at a good price(almost 300 euros). Features:

-400GB space
-7200 rpms
-150MB/s

Basically, I think it's a good buy.
The cover has a huge cooling fan, a bit bigger than the one shown by Lemur, and a smaller one up top(normal cooling fan).

As for RAM's, I opted for a dual 1024MB DDRAM Corsair. The performances are good, but if there's room for improvement, I'm open to ideas.