The Corsair 800 d would be my first choice of course. Not the wind tunnel the HAF series are but if your looking to go the water cooling route you couldn't go wrong. Room in the case to mount 240mm Rad. http://www.newegg.com/Product/Product.aspx?Item=N82E16811139001
The Cooler master Haf 932 is a battle tested performer was on sale but still at a good price of $139.00http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4146085&CatId=1510
The Cooler Master Haf-X enuf said. This thing is Beastly. Massive case, space, and cooling, but the indudtrial look of the Haf's just lost it's appeal with me.http://www.newegg.com/Product/Product.aspx?Item=N82E16811119225
Last but not least are the Sivlerstone Series. I like the 90 degree rotated mother boards and the 3 bottom mounted 180mm fans . The Raven series has 2 I really like, the Rv02-ew and the Rv03http://www.newegg.com/Product/Product.aspx?Item=N82E16811163173http://www.newegg.com/Product/Product.aspx?Item=N82E16811163180
And Traumadissater, Good luck finding a full tower for $50.00 and under and what do you mean by wasting $100.00 on a 2600K?