I had to sacrifice my main living area in order to accommodate the HT2-TL’s. My wait for a new place is almost up. I am sure happy with my decision. Did I miss whether you heard the HT2-TL’s? I think you will be very happy if you can place them along the rails. I had mine at one time with much less distance from speaker to seating than yours and it was great. I don’t like the 5 ft distance between arrangement. Up against the rail, proper toe-in, it will be great. You need to plan for some sound panels on the back walls.
Only one thing your statement "and I also want something that I won't feel the urge to upgrade in a year or two, whether I am here in the same house or in a new one". that might not be possible, I find myself wanting the SS10.
Good luck in your decision,
Harrison