I have great response from a Jadis Orch Refer driving a pretty difficult speaker for a small tube amp.
Its a MTM speaker design and the little Jadis does wonders. However its difficult to find used at $1500, might have to go up to $1800.
Just as good would be one of the bigger Cayin's. Not their low end stuff.
The Cayin model I think compares with the Jadis is the one with the 4 KT 88's. Those are quite often found used here.
If I had a choice today I'd go with the Cayin for half the price as the Jadis.
Good Luck
Paul