I have my 1090t at 4Ghz, idles at ambient temp, never gets above 54*c on full LinX load. That is with the stock corsair fans in pull setup inside the case. If I put them on the highest setting full LinX load doesnt go above 50* if that.
As for a fan controller, unless you can remove the knobs, you wont be able to close the door. but it is removable if need be.
Oh, I am now running 2x 140mm YL med fans on the side. Keeps my 4890s about 10* cooler and still dead silent. I am now able to keep my 4890s fans at 50% or less under full load. (Diablo 3)