CM HAF 912 is probably the best case for the money. It has very good ventilation, and in my opinion is a great deal.
You won't be disappointed, as you will have good airflow, and it will probably make it less noisy.
It also is a little more roomy than the rose will challenger, as I have the same case, and cable management is kind of difficult.
Another case that you could get is http://www.newegg.com/Product/Product.aspx?Item=N82E16811119197&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&AID=10446076&PID=3938566&SID=
Which is even better than the HAF 912 and has 3 fans, and would be a good deal also.