Definitely recommend the McCormack DNA-2 for about $2200 used, and then sending it to McCormack for the Rev A upgrade at $2500. This will give you one of the very best amps out there. And I believe that the amp is the most critical piece to a system, especially for listener involvement.
Based on my experience, if your amp is doing it right (some to very many do not), so many other aspects of your system will sound 'right'.
After that, look for power conditioning and dedicated lines.
These tweaks along with the DNA-2 Rev A should give you the involvement you are seeking.
-IME