It all comes down to your ears. But, IMO, a CJ MV 60 SE is the best route. New it is a little more then your 2500. You can get a MV 60 used for 16-1700 and then have it upgrade for 300. It is a wonderful and magical amp.
Recommendations for tube amp to replace Plinius
I am driving a pair of Legacy Focus speakers with a Plinius 100 mk3. The Focus speakers have an impedance of 4 okms and a sensitivity of 96db. As such the speakers may be a good match for a tube amp. Any recommendations for a tube amp in the $2500.00 used market range? The rest of my system consists of the Placette passive pre-amp and a Cary 306/200 cd.