Apologies up front if this is posted improperly, I've hardly participated in forums before and I'm figuring them out as I go. But to PDrew57: For what it's worth, even though I really miss the expression function, I have not regretted for one second getting this, and the biggest reason is the action. It might be the best I've ever tried on synth. And I think there's a big factor involved that I haven't noticed being discussed, (except in the review of the PX350). The PX5 senses and SENDS high def MIDI. Aside from the internal sounds, if you've got virtual instruments that receive hi def MIDI, it means that instead of 128 steps or gradations, you get 128 squared, or 16,000+ steps. The VI that I use most is Pianoteq and the difference playing it with the PX5 has made this choice completely worth it. So just in case you have yet to play one, I'm posting this to let you know that when I brought my laptop to Sam Ash and plugged it in, I was hooked. best regards, Ron