I have a pair of Odysseys and drive them with Jeff Rowland amps (passively bi-amped with Concentra and 112). I've heard others say that high powered tubes can work wonders, but others have cautioned me that solid state is the only way to go with the bigger M-Ls. I would recommend Pass, Theta, Classe or McCormack. You'll probably get a number of varying responses. Best of luck!