Amp recommendation for Alon IV

Could someone recommend me an amp for a set of Acarian Alon IV's? I was thinking of venturing into world of tube amps, but I hear the Alon's are pretty power hungy. I'd like get an amp for $2000 or under so I don't know if getting a tube amp with enough power will be possible in that price range. Any suggestions would be greatly appreciated.

I currently have a Rega Mira 3 integrated, it's possible for me to use this as a preamp only, correct?