Cary 805s will drive many speakers to high SPLs, given the size of your room. I've used the Merlin VSMs that Bob mentions with wonderful results. I've also done well with Verity Parsifal Encores (a tougher load), and several other near full range floorstanders. You can go a lot of ways here.
Marty
PS The amps will sound different with 211 vs 845 outputs (shouldn't, but IME will). You may want to try both types with the speakers you're considering in order to figure out the better match.
Marty
PS The amps will sound different with 211 vs 845 outputs (shouldn't, but IME will). You may want to try both types with the speakers you're considering in order to figure out the better match.