quick look says the mp11 and ca58 have basically the same action. The mp11 is mostly for people who will be playing on stage or portably, so it doesn’t have a big advantage for you guys. I’d favor kawai’s’ integrated systems if the price isn’t a barrier. They do a pretty amazing job of integrating, and use an actual piano soundboard for their resonance, so it feels right. The FP90 is a VERY highly regarded piano. I wouldn’t rule it out over something else for someone else. I don’t think it’s a bad choice. If you’re buying new, dealer matters, so go with the dealer you trust for either. Sent from my iPad using Tapatalk