We have a sleep number bed on our LA and we love it. Separate controls make the bed comfortable for both of us. It is a king mattress. However, they are not cheap. A cheaper solution might just be to get a 3" topper and put it over your current mattress.
Tony & Ruth........... FMCA#F416727
2016 London Aire 4519, Freightliner chassis, Cummins ISX, 2018 Jeep Wrangler Unlimited, Blue Ox Avail with AF1. TST 507 TPMS