Hello OSB

I'd call Kevin at Upscale Audio (909-931-9686) and see if he has any used integrated tube amps for $500, maybe a nice ASL MG S1 15DT. Audio Advisor has the 15DT for $699 new. You can get a modified renovated heathkit from Mapleshade (my favorite cable manufacturer!) for $700. http://www.mapleshaderecords.com/tweaks/tubeamps.php

Good luck!!

Enjoy the Music. Trust your ears. Laugh at Folks Who Claim to Know it All.