If you want to stick with c-j, I've heard several people say that the new MF-2250a is a substantial upgrade over the 2500 even though it has lower power.
Also, if you wanted to explore tube amps but didn't want to moev all the way up to the new Premier 140, the MV-60SE is supposed to be very nice and might be easier to live with (i.e., smaller size, less heat, etc.).
Also, if you wanted to explore tube amps but didn't want to moev all the way up to the new Premier 140, the MV-60SE is supposed to be very nice and might be easier to live with (i.e., smaller size, less heat, etc.).