Magnepan, How Low Can You Go...power-wise

In terms of bang for the buck, the $1200 NAD intergrated reviewed by Sam Tellig in Oct Stereophile seems hard to beat, and should do a very nice job with your 3,6's.

I keep being amazed by the responses to this. I want to know how many of these respondents have ever actually owned these speakers, and if so, how long did they keep them? If they used the dreadfully underpowered amps they have recommended I would assume it became very unsatisfying listening.

If you put that NAD integrated on a pair of 3.6r Maggies, it's not going to sound good. The amp may be fine with other speakers, but it's not going to bring those panels to life.

I have never owned them, but have sold them here in PA. Maggies need, or at least do so much better, with much high quality power on tap.

More power is better, but - If he powers them with the Sim amp in question he will be fine.
He'll get to Brazil, plop down on the couch with his favorite beverage and smile and be glad he bought the Maggies for a great price.
If he finds another ex-pat with 1000w monoblocks at a great price he should buy them as well. But the OP's question wasn't "What's better, 150w or 1000w to power Maggies?", which is where this thread has gone more or less.

btw: I've owned 12's and 1.6's for about 10 years, no longer have them.

Sebrof is correct. But the op also asks at some point if he would be doing a disservice to them with the simaudio. The answer to this in my opinion is yes.

Magnepans need enormous amounts of juice to sound their best. They can sound good with much less power and even nice with low power but if you want to hear what they can really do need big time power. I would say 600 a side at 4ohms and more is better.

It has nothing to do with loudness-