Strategy and Components Advice Needed

I think my audio/HT strategy is finally starting to take some shape but I still have some learning to do. So...

HT quality is not as important to me as stereo audio quality. I am more than happy with my low-quality integrated now so believe I'd be set with a decent mid-fi integrated HT such as Denon 4806, Outlaw, Rotel, Sherwood in the 1000-1300 range or so. Will keep the surround speakers I currently have or upgrade over time.

Now I have to consider the stereo side of things. I have a pair of Amphion Argons inbound as my first forray into something decent (well, second sort-of, used to have Linn Helix but no longer).

I'm leaning heavily toward integrated SS for a variety of reasons - cost, space, complexity, and I'm not interested in the tube route (I'm a guitarist and have my hands and budget already full with a complement of tube amps and commensurate NOS tube searches and biasing etc etc).

Question 1: how do I use the same main front L/R speakers with both setups? Is this HT pass-thru? If so, how does that work exactly please?

Question 2: what ss integrated amps in that price-range used do you folks like? Yba and Krell and Creek have caught my interest so far. Benefits of one over the others? Which models?

Question 3: it looks like the stereo ss integrateds don't seem to have a way to include a subwoofer in the setup, is that correct? If not, how do people deal with using monitors (the Amphions are spec'd at 40-22 I believe)?

THANKS!