Then you need to stop listening with your eyes and listen with your ears and heart

It's already been done and the expensive blingy modern Luxman came a very poor second I recall, although it was the integrated model I recall...

In terms of physical "feel" there'll be absolutely no contest, as the far eastern product will easily beat the little UK contender and in straight forward measurements too I suspect.
You have what seems to be an expensive system, so a mere £1500 on a couple of plain UK hand made amps with glowing things within and little else isn't going to float ones boat the same. However, an overweight and over-complex amp is what killed the Japanese top end onslaught over in these parts first time round..
Just my current views, and I'm known to be a bit mad even in my saner moments, but maybe US region things like the Bottlehead stuff, if it's as giant killing as I suspect it may be, may show you where I'm coming from, even if there may not be enough power for the M40's, which have a fair old crossover to row along within them
