Soulution 710 Amplifier and 720 Preamplifier

Friends:

I am just curious how much better these ultra-reference, ultra-expensive Swiss units are than well respected American reference products like Pass Labs, Spectral, Boulder, Clayton Audio on the SS side or VAC on the tube side.

I am driving German Physiks Carbon mkIV omnidirectionals.

I am told the Soulutions are ultra neutral, ultra-transparent,and ultra musical, sharing the finest characteristics of tubes and SS, yet high bias class AB I'm told by a dealer.

I realize all is in the ear of the beholder, but are these swiss designers using better parts, more innovative circuitry, etc to generate a level of musicality and purity a notch above the finest US brands?.

I am looking for a final purchase as I approach retirement, and am actually considering the Soulution 710 Amp and 720 Pre (an almost mind-boggling cost of $85,000 retail, less a fair discount)..yes I am most fortunate to be in this position, but I do not wish to pay $40,000 extra for 3% difference in sound quality. (I realize this is the nature of purchasing ultra-reference high end gear)

Any strong opinions about the Soulution line would be greatly appreciated (including reliability) Yes, I am planning a trip to NYC in less than 5 weeks to audition, but your thoughts would be a helpful foundation to my audition.

Thanks in advance
Brian