I used a Bryston 4B with my Magnaplanars (back in the 70s) You talk about a great speaker that needs oodles of watts. I had no problem, but I never had enough power to get some of the SPLs I needed. A pair of Bryston 4Bs running mono would have done better. That would have given me the juice I needed. Didn't have the $$ back then, but would do it in a flash with the Maggies of today.