Since you have a fantastic sub and mains are high passed taking MUCH of the load off of your amp, you can cast a much wider net - IMO seeking out an amplifiers with “ magic midrange “ vs. a lot of $ going into an amplifier you “ could weld with “. Obviously a place to start is w Quattro owners, dealers and RV… I commented the owners forum on your thread there :-).
Dont miss the opportunity to greatly shorten the speaker wire impact to sonics AND added expense by making the move to monoblocks… this is where a dealer / designer focused on systems engineering / thinking / synergy will be of help… The 7 / HPA 7 system ships w 30” speaker cables…for a sonic…reason.
Best in your search and quest !
Jim