that completely depends on what you are trying to do and what you're priorities are. If you want the best possible airflow that means you need the most area to install fans so a good full tower would suit you well. Do you want to install a window? I personally have a En7237 (a good sized mid-tower) its easy to mod, I've got casters, plexi, blow hole, 2 80s exhaust, 92 intake, 4switch baybus, 92 side intake in the plexi. Great case and cheap (around $50 + shipping w/300 watt psu). It really depends on what you are trying to do though. I would recommened a full tower over all though.