Amp recommendation for Klipsch Heresy

A friend of mine just purchased some circa 1980 heresy's. I am trying to help him build out the rest of his system. What do you guys recommend for an amplifier? He would prefer something of 70's to 80's manufacture and we have a budget of around $400 dollars. I have never listened to any vintage klipsch. Do they do better with tubes or solid state? With his budget, I would assume tubes are out. Do any of you own heresy's? What are you using to drive them? Thanks for any thoughts or suggestions.

Andy