Any of the Classe amps (integrated or not) would be playing in that price range, give or take 100 bucks. Great little boxes with excellent build quality. And with you mentioning soft smooth tube like mids and highs, that's the first name that came to mind. Although it is a little power shy though with regards to your wattage requirements.
And theres always the T-Amp.. :)
And theres always the T-Amp.. :)