Seems like JA has been using the Bel Canto REF500Ms at several shows and getting rave reviews as usual, so it would seem they would be worth a listen and might be within your budget used. I think I read they're using the 500Ms to drive the new Pearl 3s at CES, which would seem to be a pretty nice endorsement if it's correct. Have no idea if they'd be a good impedance match with your tube pre, so something to check. Best of luck.
Tubes or Solid State for Joseph Audio speakers
I own a pair of Joseph Audio RM-25Si's and have been using tubed pre and power amps. Have any Joseph owners found an outstanding combination of pre/power amp that has been accurate yet sufficiently warm, and serves the music well? I listen primarily to LP for enjoyment, secondarily to CD. I really enjoy the Joseph's and they are a pretty even load for amps to drive, and I plan on keeping them. I have tried contacting Joseph Audio for their input, but with no results so far. I need to keep the power amp under $1500, and will keep my tube preamp.