Well I've been running a Raysonic 128 with a Cayin A100T. Up until recently I thought it a big, dynamic, and warm sound but not having as much resolution as I like. A simple change from 4ohm taps to 8 ohm taps on the Cayin was all it took to restore a much higher degree of resolution/speed needed for this unit (and not so much for my other stuff). I would recommend it in your price range, in fact I think it is a steal used. And, FWIW, tube rolling can be very productive and you can change its tone easily thru using different current production tubes as well as NOS. It is not terribly demanding, noise wise.
FWIW.
FWIW.