Thanks for the responses so far.
I forgot to mention that I already wired the room for 9.1 (7.1 + heights) including in-ceiling speakers for the back 4.
I'm actually thinking, what can I do in case my 'builder' friend comes through for me eventually with the custom built speaker set. He does this stuff pro for big companies, and would be doing it as a favor.
I thought - might be cool to just buy a used or discount set for now, so that in case that happens, I can...