I ended up getting the 805D3's, and the F6 drives them quite well in my space! I am bi-amping, using an Aleph-J on the tweeters; but I tried with just the F6, and was happy with that as well.
I can't test for top SPL, out of fear of getting kicked out of my apartment :) It seems, though, that this would play as loud as I'd ever want.
And, oh, the clarity and separation of instruments! Highly recommended.