I bought the D1 mainly because of the keybed and the looks. I got used to the acoustic pianos touch so I was picky on this one, but the RH3 gets as close as it can to a real piano's keys (especially at this price) which was the most important factor for me while choosing a stage piano. I also found the design the most beautiful among the other stage pianos. It's simple yet serious and elegant. It doesn't have a usb port, but a little more professional musician would use the midi anyways. (Or you can buy those midi-usb cables if you want to connect directly to your computer.) The general feel of the keys is great, but after using it for a while it becomes even smoother. I think the only "bad" thing is, that it doesn't have a split function which could've been good for having a piano lesson with a student, but it's not a must. All in all, it's a great instrument, I highly recommend it to everyone who's thinking about it.