Also do you think it's a better idea to get a CPU/mobo with integrated graphics, or is it okay to use one of the mining GPUs for video? (this would be a dedicated mining rig... it would just be sitting there with a terminal running cgminer)
For my latest build I picked up an AMD APU to power the monitor instead of off the gpu or integrated graphics. $43 for the APU, just needs to be set as default display in BIOS. The only problem with this is you are more limited with the mobos available, most only have 2 pci x16 because of the APU slot, but mine also has 3 PCI x1 slots.
Best mobo for APU is ASRock A55DEL 5 x PCI-E for under $70
I've heard of a lot of problems with asrock, I try to avoid them. I got lucky and got an open box deal on a gigabyte FM1 socket for $65. But no 6 pin. http://www.newegg.ca/Product/Product.aspx?Item=N82E16813128515