$1000 used amp. What can I buy?

Ok maybe $1500. I have always had solid state; don't want to mess around with tubes. Currently a biamp setup with a crossover at 100Hz. This setup doesn't sound bad but I think I could do better. I have a Sunfire preamp. Most amps I have owned been Leach-based circuitry. I have heard some new Classe(way more expensive than I can afford). Am told Threshold is good and durable. Not sure about Bryston, Adcom, etc.

Any opinions would be appreciated.