Under 1500$ Solid State Amp for Usher Be-718

There's only one way to get a tube like presentation and that's with tubes. Some solid state amps, such as the Usher, are a but warmer in comparison to other solid state counterparts. The biggest difference in in harmonics where solid state cannot give you the same 'tone' as tubes.

The Usher amp is very smooth with excellent dynamic control. One of many good options.

The Redgum RGi120 enr on eBay right now would be a great piece if the auction stays in your budget. Best damn solid state I've heard.

Full disclosure: its mine.

I recently picked up a new Harman Kardon HK990 amp for $1,500, and I can't recommend it enough. It easily pushes my Mirage OMD-28s, and they have never sounded better. Instruments sound infinitely more real. Imaging is fantastic, sounds is warm but not too much. I listen to music a ton more than I used to, because of this amp.

The room correction software, and bass management are invaluable!
Mot

Odyssey Audio Khartago.

Deciding to go for Musical Fidelity M3i or M6i, is there any
major difference between sound quality of both amps, as M6i is
900$ more.

Any suggestions will be welcomed