Earlier quoted context omitted.
Most MIDI keyboards aren't really made for piano performance or even really for piano practice. If you want a MIDI controller for this reason, I'd recommend going to a music store near you (if applicable) and playing a few and feeling the keys and go with the one that feels nicest for your budget.
I bought my wife a Yamaha Arius YDP-184 and she loves it. It's not 100% like the baby grand she does lessons on, but it's close enough for most purposes. It has a MIDI interface, but it's not really easily portable.
I definitely recommend it, but I'd suggest trying it out in-person if possible. The key weights seem very heavy to me.. but it's entirely possible that this is how higher-end pianos feel and I lack the experience/familiarity.