This new Roland is, in my opinion, the best piano feel, reaslitic sounding synth on the market today. I originally bought the Korg Triton Pro-X, 88 note version because of the built in sampler and sequencer. While the touch screen is fun to use and novel, the acoustic instrument sounds on the Triton are pathetic. The pianos sounds absolutely nothing like a piano and the acoustic guitars are not much better. I returned the Triton after a week of being disgusted with the acoustic sounds-and the weighted action keyboard is also pretty poor. Once again, feels nothing like a pianon. So far, the best action I have played on a synth has been Yamaha's 88 note synth. The next best thing to the Yamaha is the Roland XV-88. I bought the Roland after returning the Korg and have never looked back. The pianos are very good, and get better with a little tweaking. All sounds are capable of extensive altering, and the 128 note poly is what a synth should have at this price range.
As a classical pianist and blues/pop composer, I have played pianos all my life--mostly Yamaha, Kawai and Steinway. I am not all that familiar with synths, but this one seems easy enough to figure out. The sounds are fantastic and real, the action is very good, and the expansion is massive. While it would be nice to have an onboard sequencer, the hardware sequencers are usually better anyway, although cost a pretty penny, like the Yamaha QY700 or Roland's top of the line sequencer.
Check out this machine if you want incredible sounds, expansion, and realistic piano feel. Buy Korg if you want techno/dance music production.