I would drop the case and switch it to this one for less. (COOLER MASTER Elite 341
) I wouldn't spend that kind of money for a case with the rest of your setup.
With the savings, I would just upgrade to the Samsung Spinpoint F3 1TB
You got a good PSU but I might look at the CORSAIR CMPSU-400CX
, which will be cheaper after you use the MIR.
Don't forget to look for combo deals!!