worth a DX11 card?

[whatnot]

And another thing I haven't seen an answer to is that how will the performance balance be between CPU and GPU.

I'm planning on investing on a new cpu to accompany my GTX285 for FSX, but it pisses me off that I can't find anything that would clock high without OC'ing them regardless of how much I'd invest.
So do I have to put my propeller hat on and go SubZero on my cooling arrangements with SOW or can I rely on decent CPU accompanied by high end GPU?

I don't need any specs at this moment, but general thoughts on the matter would be nice.