Everything looks good. As regards to the case and PSU, what are you looking for in a system? What is your budget? Are you going to overclock? Are you leaning towards the quiet side or the cooling side?
As DogSnake mentioned, Antec 1200 and CP-850 PSU is a great Case/PSU combo. Antec 1200 is known for its cooling and the CP-850 should run fine with a 5770 CF.
If you could wait until early next month, Antec is coming out with its new Dark Fleet series cases and the Lanboy Air.
More information can found here: http://www.bit-tech.net/hardware/cases/2010/04/20/first-look-antec-dark-fleet-pc-case/1
Another suggestion I would like to throw out there is the Antec P193 (which is my personal favorite). http://www.newegg.com/Product/Product.aspx?Item=N82E16811129062&Tpk=Antec%20p193