jacko,
Too bad you sold your Super Zen - it's a wonderful match with the Super 7 Monitor MK2. It seems the ultimate match may have missed each other in the fog. Maybe get a common denominator in your system, be it amp or speakers and go from there. I've not heard the Mini Torii, so I can't comment on it's sound, but I've yet to hear a better amp than the Super Zen, regardless of price.
The reason your 7XRS's were overpowering your room may have been due to the lower damping factor of the Super Zen, which would have been a plus with the 7 Monitors and your desire for a little more bass. The Mini Torii with it's higher damping factor, may have you back at square one - not enough bass.
If you keep your 7XRS with it's greater bass weight, the Mini Tori may be the perfect match, taming the bass with it's higher damping factor.