I would suggest either McIntosh MC312 or MC462. The 462 is a reference quality amp. Even used, they are above your budget, but these are end-game amps. I have wasted thousands of dollars on audio which I could have saved if I had "bought it right" the first time.
Also another sleeper is the Rotel Michi S5. It is a powerhouse and presents excellent value/performance in this insane world of high-priced amps!
Best of luck in your search!