That is a GREAT price range, U should get a wide choice.
I certainly have not heard every amp in that price range, so cant badge a "BEST"
You have not indicated which speakers you are using.... are they efficient ?
Do they need to me "tamed" ? If yes, then an audition, preferably in your home is a MUST.
I would generally recommend the Prima Luna 2. It offers all that U are looking for plus Oodles of ambience and soundstaging.