Ayre V-5xe or Ayre V-1xe; any of the big Pass amps.
There are a set of BAT VK-1000 monoblocks for sale now-I'd think about those, in addition to the VK-220 & VK-250.
Owned both Ayre pieces, currently have the VK-200, which is in the same family as VK-1000 & have listened extensively to the VK-220 (w/BAT pack) and have listened extensively to a Pass 350.