Re: Need some expert advice on an i5 build
To answer your questions;
1. Yes, I would absolutely get 8GB right off the bat. RAM is cheap enough so you might as well.
2. What kind of hard drive you got?
3. It all depends on what you're looking for. Personally, I would go with the 7870 over the 7850, but if money is tight, go with the 7850 and overclock the daylights out of it.
4. What type of PSU do you have? Brand and wattage?
FX-8350 @ 4.7 cooled by H80, 32GB Mushkin Enhanced Blackline 2133, Asus Sabertooth 990FX, 2x Radeon HD 7850 2GB in X-fire, 500GB Samsung 850 Evo, 4TB Seagate, 3TB WD Black, 2x 1TB WD RED in RAID 0