Hard to say what would match. I would personally call or email Klipsch and ask them. Most manufacturers are much more helpful than dealers and know the products too.
Aside from that, what’s the budget? I used RSL c34e’s in my ceiling for 7.3.4 and they’re great and only $125ea, but Klipsch probably have some that would match better.
I also might recommend NOT using rear surrounds and jut doing 5.2.4. Imo, you need 5-6’ behind the LP but I think the distance you’ll have is too far. AND, a well setup 5ch bed layer can be just as immersive. I use a Marantz, but sister company Denon will sound the same, and have the same Audyssey room correction. Yamaha AVR’s can make for great HT hubs, but I personally hate using them, and ypao isn’t as competent as Audyssey.
You’ll definitely need to invest in new subwoofage too. A ported pair from SVS, Rythmik, HSU, monolith, seaton, or JTR is where I’d look. Don’t underestimate quality bass. I can tell you the ksw12 isn’t even close to good modern subwoofers. Again, budget rules the day.