No, the bottom on the Behringer isn't the heat sink. They use some extremely crude folded metal (U shaped) pieces that the output transistors are soldered to. They are barely heatsinks. Look at the four copper squares. That's it.
That stuff never gets old. The truly funny thing is they are 99% of the time plugging into a wall outlet with it.For less money they could get a symmetrical AC CMNR power supply that actually has real world engineering/physics/math behind it. Companies like Transcendent Sound and Furman make units for about every budget from $700 to $3500. They'll do a good deal more than a power cable.
The iNuke's will need to be fan modded. The Crown XLS and XTi are quiet as in an ear 6 inches away can't hear them under reasonable home listing levels. Any levels that would get the amp to kick the fan on and you wouldn't hear it anyways. The Peavey IPR is also low noise.
I'm up for almost anything that will make a night vs day difference. If I could spend a measly $300 on a power cable for it to make that difference I would. I brought a loaned Pangea power cable to last years GTG in November everyone had a good chuckle.
Even The Absolute Sound has a published guide to stand mounted
Here is a speaker designer posting at Computer Audiophile
It's a valid class of speaker.
I don't often see MTM's referred to as bookies.
I know you aren't speaking to me directly in the above but hope this helps:My placement is 18" off the back wall and 23" from the side walls and slight toe in. Moving them in toward the corner shrunk the imaging and while it increased the bottom end there was too much bloom with it.