Any Thoughts On These?

Haven't heard the KEF R11s but did do about an hour of seat-time with the R7s. I've done a fair amount of seat-time with KEF, B&W and other British speakers, over the years.  The only British speakers I've ever spent serious seat-time with and liked, thus far, were Monitor Audio (i.e. Silver 300 and 500) but that's just me. As I'm sure you know, more than anything else in audiophile land, speakers are a very subjective choice. Different ears like different sound signatures and, of course, a lot depends upon your room dimensions, acoustics, component chain and musical preferences. Best is what sounds best to YOU! Your ears will tell you everything you need to know.

I currently have a McIntosh MA5200 in my main system and absolutely love it!  The only things I've heard around its price point in controlled auditions that could compete (IMHO) are the Simaudio Moon Neo 340 IX and a Luxman whose model number I can't remember. The Musical Fidelity M6si was very nice, too, but I heard that one in another shop with different speakers and different room acoustics. Not a fair shoot-out. Also did about 3 hours seat-time with a MAC MA5300 which is basically the same as the MA5200 but with the advantage of the option for an upgraded DAC. I heard the Simaudio Moon with the ML Motion 60XTi and that was REALLY nice!  If you can afford that combo I don't see how you'd be disappointed there. However, as with the Krell amp, you might want to shoot higher for speakers with that one. That Simaudio's current supply is outstanding! You might want to schedule some seat-time with Revel speakers for that one.

It's really fun helping other people spend their money!  LOL!  Good luck!

oldaudiophile - thanks for all the great info.

I once owned a McIntosh MA6600 and it didn't seem to make my Martin Logan Spires sing, so I can't really comment on it's sound signature. Sold it and bought a Coda CSiB (also tried a BAT VK-300x SE) both of which drove the MLs better than the MAC.

I have a bunch of different combo's swirling around in my mind, some as you have suggested here, but I keep coming back to the though of active speakers. No fuss, no muss, no cables, DSP. Maybe not forever, but in this particular house, it may just be the ticket. I just need to find some to demo. 

Heard some ATC 40s' (too big) and some Genelec 8331s' (too small).

As I said, the hunt continues!

High-amp, the hunt never ceases. It just goes from vicarious to serious sometimes.

With regard to active speakers, have you spent any time with GoldenEar Tritons? The day I spent about 1.5 hours of seat-time with the ML Motion 60XTi, I actually A/B'd them with the GoldenEar Triton+2 and spent about the same amount of seat-time with them, as well. Unfortunately, the sound room I was in wasn't the greatest and the GE only had, I was told, around 20 hours play on them. The ML, I was told, had about 40 hours play. Power source was a Simaudio Moon 340 IX. You might want to give the GE Triton line a listen if you can find a shop with properly broken-in pairs and a proper sound room.

oldaudiophile
https://forum.audiogon.com/users/oldaudiophile
I’ve had some experience with Goldenear’s products but not their floorstanders. Most people speak highly of them . I’ll try and check them out thanks.

I prioritize imaging above all else in my speaker system; and in my experience, ribbon tweets like ML’s serve that purpose better than most other tweeter designs I’ve heard. I’ve heard the MLs demoed and they certainly meet my requirements in that regard. But so do ML's EM-ESLs with their virtual line-source electrostatic drivers; and they ended up being my choice.