At 87db per watt meter at 6 ohms nominal the little guys are juice hungry. I couldn't find Revels recommended horspower but I would gather ebven in a smallish room that you will need 100 high current watts . Since it has all metal drivers, I would imagine you want warm watts.
See if Oddysey's top all Class A amps fit your budget.
CJ are as rule quite toasty sounding,
A Mac might be too hard smack down SS and too much money but they do work great with my squealing Old Klipsch LasScalas.
An older SS ARC amp is a good choice if refurbed.Not the digital SS they use now.
As for tubes you'll need to spend more for that kind of current.
See if Oddysey's top all Class A amps fit your budget.
CJ are as rule quite toasty sounding,
A Mac might be too hard smack down SS and too much money but they do work great with my squealing Old Klipsch LasScalas.
An older SS ARC amp is a good choice if refurbed.Not the digital SS they use now.
As for tubes you'll need to spend more for that kind of current.