Harddrives - which?

[spel565]

I heard you cannot use Seagate Momentus XT in raid0 (?) so i was thinking about:
using a
60gb ssd for OS and some applications
500gb Seagate Momentus XT for steam games and other games.. maybe some applications
2tb storage for everything else
Is this stupid in anyway?

 

[spel565]

or just get another Seagate Momentus XT 500gb instead of the ssd?