I have a thermaltake, great case, great company!
Stay away from cooler master as as on as you have a problem they will make up some story to tell you and leave you with something that doesn't work and a hole in your budget.
Really as long as you do you research on the cases that you think look good, you won't go wrong very few cases today have bad air circulation (outside of the 900d and those cases)
Good luck mate