I had the P150 in Canada. I eventually got the P200 here in Japan. When the 250 came out I immediately sold the old one and got it. This is not something I would usually do, but the 250 was so much better sounding. This really is a joy to play: the main grand piano and electric pianos are simply lovely.
Several words of warning. With this version Yamaha added a General Midi sound set in addition to the 10 or so main sounds. What this means is that using this with a sequencer and setting patch changes suddenly became a royal pain in the neck. Don't even dream of a pop up list of patch names. The best you can do is:
1. Stay away from the General Midi sounds completely.
2. Set your sequencer to record and then select the sound you want: the patch change will be recorded.
Once again Yamaha demonstrates that marvelous Japanese ability to turn something great into something awkward by simply adding features without spending a moment to think about the user interface.
Also because of the built in speakers, the P250 sounds much better when you sit down and play it than when you record it. The speakers add just the perfect colur to the sound and the sympathetic vibration offers a sense of playing a real instrument and not just a sample playback gadget. All in all this is the best electric piano I ever heard.