Another place 2 start, newegg has the Cooler Master Storm Scout SGC-2000 with a $20 rebate until the end of the month. This brings the total to $80 approx. with free shipping. This has a carrying handle, comes with 3 mounted fans and switchable fan lights. On the other hand, some PSUs might have cable length problems. Just a thought.
Your are in luck! With a stock AMD heatsink and an ATI Radeon HD 5770 that is only 8.5 inches long you can use any mid-tower pc case you want. In fact, newegg.com has 455 pc cases for sale starting at just $19.99: