Well this is what Anandtech had to say in their review:
"Once again the Core 1000's fan speeds are offering performance roughly comparable to the more expensive Corsair 550D, but look at the noise levels. While idling both enclosures are at the noise floor of our sound meter, but under load the 550D is far more graceful. That's what you're spending the extra money for. There's no way around it: the Core 1000, even at stock settings, is noisy, and the gulf between fan speeds on the Core 1000 and Antec Eleven Hundred demonstrates that the less expensive enclosure also doesn't have anywhere near as much thermal headroom to work with.
It's better to get this out of the way ahead of time: the Fractal Design Core 1000 is not a case for serious overclockers. Mild overclocking and tweaking is fine, but if for no other reason than that it's incredibly small, the Core 1000 really shouldn't be used for anything too extreme. There are budget enclosures out there that have a little more of the headroom the performance-sensitive users are going to be looking for.
The Core 1000's smart thermal design continues to pay dividends. At idle there just isn't that much here to make noise, so if the cooling on your processor and graphics card was pretty efficient and quiet to begin with, the single 120mm fan included with the Core 1000 isn't liable to make things any worse. Under load we still see just a little bit of headroom, but the Core 1000 is definitely noisy."
1. Not not really since your not into oc. unless you oc your gpu/ or oc it to a point that hot air is too much in your case..
2. With your gpu, i doubt to make it on ultra. especially on that res. I would prefer buying newer gen gpu since you still have the budget I guess. a 7850/7970 will do or if you can bump it up to 7950. would be better, 60 fps all the way.
3. Im not a fan of b75 boards, i prefer h77. but it would come down to your budget/preference.