Personally I don't buy "brands," I have my local PC store build one to my spec with good quality components which is why both myself and sliverblade recommended the Antec gaming case.
I still think you should consider making it Raid 5 though, depends how important loss of data is to you, to me it's a no-no which is why I use raid on my PC's.

Injustice will be avenged.
Cofiwch Dryweryn.