What power supply do I need?

Cases are more important than you may think. They control airflow (amount of fans is important) and they also help contain wire clutter (the 200r is probably the cheapest one that can do this). It is important to remove intruding wires since they effect airflow. These are probably the best alternatives for the 200r: http://www.newegg.com/Product/Produ... 50002120 600006302 4025&IsNodeId=1&name=NZXT
less than 50 bucks and have good reviews. NZXT is good.

I highly doubt you'll have any heating problems with any midtower case with what you've got. You might as well get something that you like and is pretty inexpensive.

Well the most I wanted to spend was $70. I didn't know if I could get good airflow and Wire management with that price but. Oh yea how big to you think the 2 graphics cards you listed earlier are? Are they about 11-12 inches or smaller?

That's fine for that price I personally like the bitfenix shinobi but the inwin BUC or NXZT tempest at that price does have better cooling.
You could definitely go cheaper though.

The 650TI has a short 6 inch PCB. The 7770 is longer. It will fit though since it is 9 inches