-
They are good lenses and it's a nice small setup. Those primes with IBIS are great. I'd probably keep the GX80, it's a little tempremental after getting damp a few times.
To be honest, this is my annual itch to go back to a larger sensor. Used to shoot with a 40D many years ago. The Canon Eos RP would be tempting but the lens selection is not there.
You are giving me bad ideas..
GX80 with 25 Panaleica
Xt-4 with 16-80
Are you keeping the GX80? Seems a shame to lose access to 2 wonderful lenses (just picked up the 42.5mm myself)
Panasonic G9 with 12-60 Panaleica with 25mm f1.4 v2 (weather resistant) would be my choice.