Okay I Bought the Magnepan 3.6's

I should know, I have one and use it myself with my Maggie 3.6's. Really plenty of power, and the sound is, I think, superb, not much different than, or maybe identical to, the Pass 250.5's.

The thing with the Pass 150.5 is that it's not really 150 wpc @ 8 ohm. It's really like other manufacturer's 250 wpc amps. Explanation: Hi Fi News, the British mag, when they reviewed the Pass 150.5 about 2 years ago or so, found that it clipped at 8 ohms at 270 wpc!! Not 150 wpc. And, at 4 ohms, it clipped at close to 400wpc. I may be off a few wpc in my memory (I have the review someplace here) but not by much.

I use my Maggies in a reasonably sized room and barely have the amp turned up. My friend had the same set up - 150.5 with Maggie 3.6, and felt it was a great match.

If you try the 150.5 and for some reason want more power, you can sell it very quickly on A'gon.

I wondered if the 150.5 would be enough for the 3.6's in my room which is 17w x 26l x 9h. Or, maybe the 250.5?

I think the Pass 150.5 could definitely do it in your room. Depends on how loud you play your system. The difference might come down to the fact that the 150.5 would be out of class A into class AB, while the 250.5 might stay in class A, though if you play loud the 250.5 would also be out of class A.

Hard to say more than that, unless you had both amps and did a direct comparison.

thanks for the recommendations. I noticed that all three of the X150.5's listed have been sold!

Take another look at Bryston,both companies use each others products when on the show circuit.There is just a natural synergy when these amps and speakers are paired.
A 4BSST,14,and or mono 7's are ideal candidates.