If you like tubes, you may want to try some of the PrimaLuna Prolouge Two, where you can use KT88 as the EL34, actually many more others. Used they go around your budget, but think of tubes upgrading costs first.
Another option would be used Red Wine 30.2, but the problems here are the batteries, not that they are bad, you have to be sure they are still good running or even new. I am not talking about an new version up here, but one before. If you concider to buy this one, ask the seller the serial number first and check with Vinnie about the model, cos some sellers are not honest and writing some things that never been done with the amp.
Honestly, if you can find a fully modified TrendsAudio T10.1 amp, man, try this first, cos even stock one may surprise you and safe you lots of cash to.
And the last, but not least, however never tried one, its Almarro 205