What PSU and case do I need?

[rivman]

Im getting ready for a new build and it's going to be a complete overhaul of my old system.
Here are the specs:

GPU: ASUS Radeon 6870 (crossfire later)
HDD: Western Digital 500GB 7200RPM
Motherboard: MSI P67A G43 B3 (or the GIGABYTE AMD 990FX for bulldozer)
RAM:Corsair XMS3 4 GB DDR3 1333mhz
Cooler: Coolermaster Hyper 212+
CPU: i5 2500k (or a quad core llano)

I do not know what case to get.I need lots of airflow and the most out of a case but at a budget of around 60-70 dollars.
And as for the PSU,what brand and how many watts would you suggest for my system?

 

[Emperus]

Keeping future crossfire possibilities in mind, I'd suggest a good 750W PSU like the Corsair TX 750 V2. As for the case, a 70$ max budget can fetch you an Antec 300 illusion which has plenty good airflow and very decent looks. There's also the Coolermaster HAF 912 as an option.