Advise for my Magnepan 3.5 R

I'm looking for some suggestions/recommendations.

I want to know really good power amplifier for my Magnepan MG 3.6 R under $3000.

My choice would be: Belles 350 Reference or a pair of the Odyssey Stratos Mono Extremes.
I use to run mine with a Spectron Musician II. Class "D" amp and well under your budget used. You could step up to the III with a little money than your budget. The II puts out a lot of clean power @ 650 wpc. The 3.6's thrive on a lot of good/clean power.
You might want to look into a NuForce 9 or a used Spectron Musician III at that price. Both very good with the power and current demands of the Magnepan planar speaker.