I would recommend the Rotel RA-972. Right in your price range and its crisp nature will complement the MMG's smoothness very nicely. There isn't one for sale here currently but they aren't rare.
However there are many options so you may need to experiement a little to find exactly the amp you want and like.
Arthur
However there are many options so you may need to experiement a little to find exactly the amp you want and like.
Arthur