A budget might help, there are some insane cases out there but they will set you back...

Some good (mid tower) cases for 'acceptable' price:
- HAF 912 Plus
- Nzxt Phantom 410
- HAF 922
- Antec 1100 Eleven Hundred
- Zalman z11 or z9

These are my personal favorites

I did some research while looking for a case for my build, I picked the Corsair Vengeance Series C70 it's a full steel midtower case with plenty of room/slots for your hardware,decent cable management, and great airflow. The case has space for 9 case fans and comes with 3 corsair 120 mm fans. It's also got some handy handles up at the top of the case.

It's a newegg webpage but it has alot of useful info on it, if your interested.
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SovietRussia wrote I did some research while looking for a case for my build, I picked the Corsair Vengeance Series C70 it's a full steel midtower case with plenty of room/slots for your hardware,decent cable management, and great airflow. The case has space for 9 case fans and comes with 3 corsair 120 mm fans. It's also got some handy handles up at the top of the case.

It's a newegg webpage but it has alot of useful info on it, if your interested.
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The C70 has pretty mediocre cooling performance: [ Register or Signin to view external links. ]

If you're after pure performance in a reasonably-priced case, the Antec Eleven Hundred doesn't disappoint. You didn't mention a budget or what kind of hardware you'll be putting in the case, though, so this is a completely blind recommendation.