Antec 1200 has amazing cooling and is very large inside so you wont have any issues with large graphics cards or cable management. Over clocked on air q6600 @ 3.2 GHz, 1.6V with artic 7 and antec 1200 my ambient cpu is 20C cores are 38-40C idle 59C under 100% Prime 95 load.
I will agree with woohoomoo tho, the 1200 is a dust magnet I have to clean the filters every 2-3weeks, they do keep the dust away from the components inside though. Build quality is great, rock solid and the fans on low (which is how I usually keep them) are quiet. When you set the fans on high though, it sounds like a hurricaine.