You are in for a real treat :-)
IMO either amp you own excellent place to start - just make sure to properly adjust Low Pass filter DIP switches when changing amps. !!!!!
i have heard Quatro CT at many dealers across USA with Ayre, Aesthetix, Rogue, ARC ( Ref 150, HD220 ) as well as VTL. frankly all were outstanding - I have also had a REF 75 at home running my 7 mk2 and can attest that it is one sweet amp !!!
i have an Ayre VX--R Twenty, you might give that a try - I think Richard and Charlie are pretty aligned on many design considerations and philosophy.
importanly the Filters are RCA or balanced but not both so plan ahead there.
the Aesthetix amp has built in filter should you go that route.
where are you located ?