The Amp Game,

Be paitent and find an old S300 II Stasis amp from Threshold.

They can be had at your limit, it will take a few months.
I saw an S500 go on e-bay last week for a kilo buck.

Also if you can live with lower output the Aleph are awesome amps at about that price used, or a kilo buck new.

jeff

If you don't mind vintage tube gear, you can get a good shape Harmon Kardon Citation II ( 60 Watt/ch ) tube amp for that price and it will blow everything you listed away.

You could also look into an Odyssey Stratus. You can get a used one in your price range. I doubt you will be disappointed, unless you need a lot more power. But that depends on listening levels, etc.

grab a used odyssey

So? What did you finally select? I have a Sony TA-N90ES and think it is the equal of many highly regarded amps that sell for much more. With its MOSFET design from end-to-end and low gain and solid build quality, it is hard to beat for $500, or so. I use with a Threshold preamp and listen to vinyl and digital and think it controls my Audio Physic Tempo IIIi speakers about as well as anything can. Wonderful, musical, lyrical sound.