Which Amp for Magnepan MG 3.6/R?

I can't tell you what's best, but I'm running mine with a McIntosh 2102 tube amp and it sounds great.

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Artarl-

From the ones you have listed, the Pass will give you the current those speakers need. I'm also gonna go out on a limb here and suggest you look at the Sunfire Signature Series II amp. Tons of current, finesse, as well as slam. Output doubles down as you halve impedence loads. I own a Signature myself to drive Magnepan MGIIIA's, so I am biased.

3.6's LOVE power.

The more power you can feed them the better.

Personally, I have driven 3.6's with 2 Plinius SA100mk3 amps in mono (665wpc into the maggies). The sound was very good.

I have been told the Bryston Amps also work very wekk with maggies. Large Pass amps do as well. The best amp though, running the maggies is quite possibly the Lamm m1.1 monoblocks (200 watts Class A inot 4 ohms).

KF

Tube amps- Big ARC, Big VTL or Wolcott's(in no particular order)

Solid State- Plinius 250MKVI, Pass 350 or larger, boulder, "p" series accuphase, BAT VK-500w/bat pak, Edge, Parasound JC-1- just to name a few- really depends what you want to spend, I am just floored by how good the VK-500 sounds in my system, I am in NO rush to upgrade, just enjoying the tunes. I like the idea of tubes but I just can't bring myself to do it with these speakers. The best thing is to try a couple and see what you like.

KF- I like the lamm idea! I would be really curious to hear that!

At this price level, your list should also include Parasound new Halo JC-1 mono amps. $6K/pair.