What case are you getting that costs that much? Sheesh, that is a lot just for a case (if it is just for the case itself). I would not mind seeing it, I have one in mind although I would like to see which you picked out.
As for the MP, I would wait a little for them to lower the prices, AMD is working on a new core I do believe and that should lower prices on the others. MP's are also meant for dual processing, so if you are going that route, you should by 2 of them

(can get pricey though).