[MATLYS]

Here is my current system:
CPU: AMD Phenom II 970 (Planning to upgrade to FX 8350 in the future)
MOTHERBOARD: Asus Crosshair IV
GPU: AMD HD 5870 (Planning to upgrade to a single HD 7990/7970 in the future)
RAM: 4x2GB Domintor GT (CMT4GX3M2A1866C9)
1xSSD Force GT 60GB
5xHDDs WD Caviar Black 2x2TB 3x1TB
1 DVD Combo Drive
1 Blu-Ray Combo Drive

9 Led Fans (120mm)
3 Regular Fans (1x140mm,2x80mm)


Right now I'm using an ULTRA 1000W(I bought it a long time ago when I made my first build). Need something more efficient for my current build. I've used a couple of online PSU calculators and they gave me roughly 600-700W range. So should I go with the 750W or the 850W to be safe?

Thanks