Austin_D Thank you, it's indeed a very detailed review. I think this user might have a slight mistake saying that CP88 and P515 have GHS whereas the GHS action is an entirely different entry level action. BTW, I think people are equally split between those that find the CP88/P515 level of heaviness too tiring (unacceptable) and those that love it. I tend to be more on the latter camp, although I admit the static downweight is indeed too high as to be unrealistic and tiring, especially for quiet passasges, however for anything else the inertia is closer to a real piano than those keyboard actions with light hammers such as some Kawai-s, etc. With that in mind, I'd be interested in hearing opinions from those people that are at least OK (if not loving) the CP88 action.
In any case, I'm currently not interested in heavy (travel weight) stage pianos because I need this only for jam sessions and gigging and I'm ready to sacrifice almost anything for light weight. So, the Numa X GT is not on my shortlist unfortunately. I'm even ready to use semi-weighted keyboards such as the Vox Continental. I think the Numa X Piano 73 is a pretty well balanced middle ground though, it's 105cm wide which is exactly the maximum I can put in the trunk of my car without the need to lower the rear seats, and at 11.7kg is much lighter than the 18.8kg of my CP88. Yet, it still has a very nice hammer action which I have tested myself. I liked the EP-s too, but the acoustic pianos were so-so, and all the other sounds were rather meh. But it has probably the best external MIDI zone implementation there is, which means I can plug my iPhone with a single cable and have great synths, organ and other sounds.
But let's not steer away this Roland discussion, I may move some posts into a separate discussion.