Really can't recommend you AMD CPU from the heart, until at least Trinity is not out. Just read a review of FX6200, AMD's fastest clocked BD (3.8 norm, 4.1 turbo). Nothing's changed, nor that I was expecting. It will be too high a risk to pin on Piledriver.
But if you want to live with your CPU for 4 years without upgrade, get an unlocked/overclockable one.
Skud - Well, you can always buy a controller for that while reflecting on your storage requirements and why you need more than 4HDD's!! :O
Sumon - Me too bro! Me too!!!
Yeah, Hitachi has just released 4TB HDDs. 4 of these will be good to go.
In any case, I think a USB 3.0 dock will be better (like the Sedna one available from PrimeABGB) if you can store the HDDs properly and safely. Windows will be happy and quick to boot up with just a couple of drives.