Lian Li has some of the best HD mounts around
1. LIAN LI PC-A04A Silver Aluminum MicroATX Mini Tower Computer Case
Micro-ATX and ITXhttp://www.newegg.com/Product/Product.a ... 6811112315http://benchmarkreviews.com/index.php?o ... &Itemid=61
2. If you are willing to use a dual hard drive dockhttp://www.newegg.com/Product/Product.a ... -_-Product
Lan-Gear.com has a killer ITX case as well as a killer Micro-ATX case. Either can accept any video card you would want... and even provide good cooling if you wanted to get an after market cooler for the card and run it fanless.http://www.lan-gear.com/langear-home
3. If you are willing to go ITX Lian Li has a number of smaller cases that work. All have good cushioning for the hard drives. The range of options increases if you are willing to take the route of using a dual hard drive dock.
see: http://www.newegg.com/Product/Product.a ... 6811112297
Here is one with great airflow that will also hold a large number of hard drives:http://www.newegg.com/Product/Product.a ... 6811112265