Very interesting to see Jacob Heilbrunn go from WAMM to AG Trio G3, and your friend disassemble this AG Trio to set up the XVX/Subsonics. Personally, at a very initial stage of having heard both speakers and owning the XLFs, I am inclined with the requisite room to go AG Trio over big Wilson, but I intend to listen to the AG Trios myself again. I have spoken with a few seasoned audiophiles who have suggested on their longer listening period with the Trios there can be a few things to listen for which bear careful consideration.
As for Lyras, I am a huge fan of Rockports...they do so many things so well. I do hope someday they will do with the Lyra what they did with the Arrakis/Altair (the Arrakis being effectively 2 Altairs, one inverted and placed on top of the other)...and create a mega flagship again. As for Lyra with subs, I think that would be amazing...its ultimate scale and sheer displacement I would query given the size of the Lyra. But in an 18 x 24 room can imagine it would be phenomenal.