300 watts @ 8ohms.
Seems to want heavy class A bias
budget $3k
What your describing will be a multiple of your budget
There is stuff in the class AB range that is "rated" at that kind of power output but I cant recommend them. Heck even some AVRs will hit your 200watt and are easily in your price range but there is a lot more to amps than their power claims.
You have to consider the quality of the watts. What speaker do you want to power?