How much have you got to spend on it?
My TT Kandalf has great cooling, 1 120mm at front, 1 120mm at back, 1 92 on the back and one 92 on the top, and on a review, they asked for another hdd cage to add another 120mm fan on the front, and the temperature wasn't 1* different.
Cases are personal preference. 120mm fans cool alot better than 80 at the same noise level.