rzrSecondly, think of a time that you need 16 gbs for gaming
There are allreeady several games that make my ram use go over 8gb
Thirdly I agree with that, so I used a gold+ psu and will probably last him if he doesn't do overly crazy builds
I would hardly consider a OC'd i5 and a R9 390 "overly crazy"
Fourth(ly?) the case you listed is barely better then the one I listed and case usually last as long as the motherboard size standard stays the same, they will only break if you go to lans often, and or move your pc a shit ton. I have plastic shitty pc cases that have lasted me years purely because I have not moved them often
The case you linked is a microtower which severely limits upgradability. High end Micro ATX boards are few and more expensive than there standard ATX counterparts.
IMO his best option is my build but with a 380x and save a bit for for a 6600k.