Thoughts and ideas on pc overhaul

so im "upgrading my computer" practically building an entierly new one, only things im thinking of keeping in from current system is ram, gpu and cd drive.

im looking for some thoughts and comments on my end build if u would like to suggest different things keep the total under 1500. currently this wat my upgraded build is looking like:

GPU: Radeon 6850 1gb x2 in crossfire (already have one just need to buy one more)

PSU: Corsair HX 850W

RAM: G.Skill Sniper 8gb (2 x 4gb) 1333 ddr3  x2 for total of 16gb of RAM (i already have a pair of them just need to buy one more)

CPU: Intel Core i5-3570k

Storage: Samsung 830 series 512gb ssd sata iii

Mobo: ASRock P67 Extreme4 LGA 1155


thinking about getting the Corsair H80 cpu cooler but im open to suggestions as long as u keep it under $100

oh yah, was thinking of upgrading case also currently i have a antec 300 illusion, kinda thinking of upgrading to the rosewill thore black for $130, but u can also feel free to make other suggestions as long as its under $150 and is a full tower case or bigger, and it needs to be good enough to cool two gpus and some other higher end parts that i may add in the future