Wondering if I get a shop to put in a high quality system behind the intouch system, adding an amp and replacing everything, if it’d work out ok.

 

Wondering if you've started this project. I've been researching this earlier this year and found some of the following:
Audison makes compatible amps/speakers/etc that integrate into the LR environment.
This is a quick vid from an installer in England: I definitely want to Dynamat the doors when replacing the speakers.