Newegg has the Corsair Carbide 500R for
$90 after MIR. I just built my gaming rig with that case and I can fully vouch for it. You can find my build pics
here. The case was very easy to use and is a steal at $90. I got it for $115 and I thought that was a pretty great deal.
As I always do, I'd recommend you spend a few extra dollars and get a modular power supply. This
Seasonic should do the job and its on sale for $80. The 500R has a decent amount of extra room for unused cables, but there really isn't anything like a nice clean and neat interior. If you look at my pics, I only had to use 3 power cables in my build. If I had a non-modular power supply I'd have had to cram the extra cables into the area where the extra hard drive tray used to be. Not a great solution. Also, why do you think you need over 600 watts of power? That calculator must be off, or those AMD chips must really need a lot of juice. My gaming rig only uses about 350 watts under load with the only big difference being the different processor and Mobo.
I also used a 7850 in my build and I love it. Its a solid card and a great value, especially with the two free games. I don't know if the 7870 is worth the extra price, especially when the 7850 overclocks so easily.
As others have said, that mobo and cpu combo are not ideal based on value or performance. Unless you really want to support AMD (and you are already doing that by buying a 7850 or 7870), you should definitely go with a Core i5 3570k and Z77 motherboard. That combo will run you less than $300 if you live near a Microcenter and only $350 at Newegg. I like the Asrock Extreme 4 or 4M, though the Pro4 or Pro4-M will be cheaper by $50-60.
For a CPU cooler, there really isn't another one to recommend other than the Cooler Master Hyper 212 EVO. I can't even find the cooler you listed, typo maybe? The Hyper 212 EVO is on sale at Newegg for $25 at MIR.
For RAM, 16gb is currently overkill, but it may not be in the future. I decided to go with 16gb and am very happy with my choice. Crucial 16gb Ballistix Sport kit are on sale for
$99 at Microcenter and
$105 at Newegg.Since money is a factor, go for a Samsung 840 SSD. I you can stretch, get the 250gb model since you will appreciate the extra space and slightly better performance over the 120gb model. Plus, it will last longer.
Lots of choices! Let us know what you decide on.
ALSO – Nevermind my links to Newegg or the prices I listed. I see you are in Romania, so I don’t know where you get your parts or how much they will cost. The recommendations remain though.
Gaming: i5-3570k/Z77/212 Evo/Corsair 500R/16GB 1600 CL8/RX 480 8GB/840 250gb, EVO 500gb, SG 3tb/Tachyon 650w/Win10