I would suggest a nice hybrid amp -- one with a tube input stage and a powerful (at least 100 Wpc) MOSFET output stage. With a little luck and maybe a little tube rolling, you should be able to tailor the sound to your taste. Counterpoint, Jolida, Anthem, and other companies make hybrid amps that would be suitable and within your price range. The right interconnects can make a difference too, so don't ignore that area.
An alternative way to go would be to get a nice tube preamp and use it with your present Acurus amp. There are many choices here, and at all price levels.
Good Luck!
An alternative way to go would be to get a nice tube preamp and use it with your present Acurus amp. There are many choices here, and at all price levels.
Good Luck!