Which Amp for Magnepan MG 3.6/R?

I use the Dreadnaught 5 ch x 200watts amp with my 3.6R's, when I first connected the amp I tried using just two channels, the sound was very good indeed. But next I tried running one channel directly into each external crossover connection for the bass and mid/hi panels using 4 of the 5 channels aivailable for the two speakers.
This resulted in a more relaxed but deeper soundstage with greater bass impact.
I find this to be the best combination of value and sound of the many amps I have tried. Of course an electronic crossover will bring this to an even higher level.

The new Musical Fidelity A308cr power amp is an amazing match.

The subthread within this thread suggests that McIntosh with Maggies is a conflicted issue. I recall that when I was setting up my system a year ago, I was advised by a McIntosh dealer to avoid their amps with autoformers and instead get one without them - so I did. It (MC162) sounded OK, but another of their solid state amps with autoformers (MC352) sounded better and the tube-based MC2102 sounds better yet - despite the lower wattage. Just an observation for whatever its worth. Two of them may be even better or bi-amping with another type of amplifier...

Skip

Bryston 4B-STs sounded good at my brother-in-laws during a recent audition. He had used c-j Premier 11s previously and I liked that combo too. A bigger tube amp would work better though. CAT preamp used.

I've had my MG3.6 for about 2.5 years now and have tried quite a few amps, though nothing super expensive (>$10K). I've never been completey happy with pure-tube or pure-SS driving them. You need either a very powerful tube amp with high damping factor (to control the bass), or a highly refined SS amp to avoid transistor harshness which WILL be revealed by these speakers. Among the tube amps already suggested above I'd add Wolcott monoblocks, which sound pretty good on the 3.6. As for Pass-X amps, IMO they sound too lean and cool, though very refined (I like Aleph better). I think panel speakers tend to sound lean anyway and need some "body" in the midrange. I've tried Belles 350A: it sounds tube-like (full midrange) but not as liquid in the upper mids.
In the end, the best strategy for MG3.6 is active biamping (bypassing the external passive xover box). This has allowed me to experiment with different amps for bass and mid/hi. The speakers really open up and dynamics improve. Bit of a hassle to match amps though, and you need to introduce an active crossover between preamp and amps. (There are a lot of threads on Audio Asylum about this.) I'm using a Marchand 3-way xover, since I send the lowest frequencies to a sub, which greatly relieves the Maggies of trying to reproduce <40Hz.
I've tried many amp combos for driving the bass (40-250Hz) and the mid/hi (250Hz-up) sections of the MG3.6, and among my favorite have been Bryston 4Bst on bottom with Belles 350A on top (nearly equal gain amps); also two Llano Design Trinity hybrid tube/SS amps, using a tube-type in each amp that is best suited for that freq. range. (The Llano's are my current setup.)
Again, I'd suggest wandering through the AA planar speaker archives, where many opinions on driving MG3.6 can be found. Good luck!