Bryston are often demo'ed with Magnepan (and are relatively inexpensive); not tubes to be sure, but I would expect it is otherwise a good match.
I would think the NOLA KO MkII should be on your short list, especially given their known synergy with tube amps. Again, cheaper than your price range.
My speakers may be available at a substantial discount ordered direct from the factory (I got about 30% off and I'm not even a reviewer); again, known synergy with tubes.
I like the Nola speakers a lot.