2 channel and HT set-up?

[GHW]

Thanks all, given me a lot to think about.
The plan is to get a Watch center to match up reasonably close to the Sashas.
I could also get another Depth i as i agree that 2 subs are better for tuning bass, this currently resides in a very small office so I had no need for the two but I am building a dedicated media room, 5.6 meters wide X 7 meters long ( roughly 18ft X 22 ft) so the 2nd sub makes sense. For now I'll use some Sonus Walls for rear and upgrade later.
This room is essentially a " man cave " so don't need the family to know how to use it, upstairs will be a simplified 5.1 system ( Denon? and Sonus Faber with Kef sub)in the lounge and a 5.1 in the kids lounge ( old school Denon AVR 2808 with Oppo and Sonus Faber speakers, Paradigm sub)
The thing confusing me is the ML switches by source sensing not manually ( unless I'm missing something) so my over complicating brain still can't work it out yet, i'll get there.
BTW narrowing down amps for the Sashas to The Gryphon Diablo or Parasound was really surprised at some JC-1"s I heard on Alexias, pretty awesome !
Thanks all for your constructive input.
cheers