I've got a Corsair 550D for sale that runs nice and quiet... . It has a bottom-intake fan and two fronts which should help with video card temps.
As an Alternative an Antec P183 or Solo II might be worth a look if you are sticking to single-card. Stick a front intake fan into the Solo II to help with temps like you would in a normal case. The P183 is an older case, but it still has measures for cable management (though not as generous as a new case), dust filters, removable hard drive cages and USB 3.0 in the front.
The Solo II has the same features minus the removable HD cage, along with thick steel side panels + sound dampening. It got panned on Anandtech for temps but SPCR gave it a favorable review after putting in a front intake fan, which I don't see as too big of a deal. I usually end up replacing the stock fans anyways.
I just finished a build in a P183 and it runs nice and quiet with a 780 Ti and 4930k. I took out the top HD cage and put a front intake fan in its place, and sealed up the top fan cover with a metal plate + some acoustipack foam on it.
As for your card temps - have you tried playing with the intake fan speeds to see if that helps? I also put the skyn3t BIOS on my 780 Ti to lock it in at 1080 MHz GPU, but I don't overclock it any further. GPU Boost would always take my card up to 80 °C if it was something demanding (like folding).