the CM690 is really a fantastic case i've used it before upgrading to a HAF then to ATCS 840 and now on an antec 1200. the cm 690 is a true value for money option u should consider... plus u can add a secondary intake fan on the front pannel using zip-ties... pretty much equaling an antec 900
Firstly check which Catalyst version u r using and upgrade if you have to.. secondly and some intake fans a good case goes a long way in improving temps and airflow...
I also have a 4870 palit 1gb idles at 46 though i keep the fan at 55%.
if you wanna a serious gamming rig, keeping in mind the inevitable ugrade to DX11 gen cards, then go in for a min of 500w psu.. i would recommend the HX-650W corsair.. A quality psu is essential for the longevity & life of ur hardware
Hi Guys.. I'm Sharan Ahuja from Bombay. Just assembled my new i7 Rig... Hope to make some good friends and share some knowledge. Must say though TE is a really good site as well as very informative...& I'm glad to have joined in