Best Matched Monitor Speakers For 300B S.E.T amps

Off base from your inquiry but you say your room is 12x12? Rooms with common dimensions are notoriously bad sometimes for listening as the same wavelength tends to get reinforced in numerous ways.(standing waves, room resonant frequency ect...) Take a look at some sites on dealing with such stuff as you are putting together a nice system and little things you do with the room and speaker placement will probably make a big difference. Do a search or start at Art Ludwig's site ( if you are not already familiar w/ Art). If you know all of this please excuse me and good listening.
I like 300b's too.

I'd like to thank everyone for your recommendations. I will keep you posted.

Try Loth-X monitors. They sound great, are very efficient, and very reasonable.