Yes... Ralph... I will try some of your suggestions. I have your M60's and have talked with you about upgrades - though, I think mine have the 3.3. upgrades. I'll try the 16 ohm taps and maybe the 4 ohm taps to see if that makes a difference with the ARC 150se's. And I'm using Paul's cables, and have his Zeroformers, which I got for your M60's for my Maggies.
But, as you know... the M30.1's and M40.2's have a bit of an emphasis in upper bass / lower mids, which I resolved with some good SS amps (the ones recommended by Harbeth)... but... I think I may prefer the sound of the ARC 150se, except for the bass bloat that is not there with the SS amps.