Full Tower vs Mid Tower airflow can be essentially the same, only difference is extra space (more drive bays, more room for water cooling stuff, more room overall). I'm using a Cooler Master CM690II Advanced, which is a good case, but if I was going to build my PC all over again, I'd probably get the
Fractal Design Define XL, since I've noticed most of the noise coming from my PC comes out the top, and that one doesn't have a top vent (the "top" exhaust fan blows out the back)
The Cooler Master HAF series is also pretty popular...I think they're ugly but to each his/her own. Problem with cases is what looks good to one person looks like crap to the next person.