I bought a Yamaha DGX 640 for around 800 US. I wish I had spent more and gone with a kawai. More piano, less toys.
But there is no end, no matter what you bought there would be a better model. Meanwhile if it were me in your shoes I could attach the 640 to my computer and run into Muse Score and do my arranging through the DP right here right now today. Since I own non, only have played on several models a few times, I can't do that.
I looked at that model too and didn't rob the piggy bank to get it, while it has plenty to work with it just felt wrong compared with the mid $2000 pianos or even that 88 key Kork Work Station for $1200 I mentioned in another post. However, meanwhile even a $500 keyboard would get me into MuseScore................. Or if I tear into my grand chasing a string that's singing incorrectly I'd have the digital backup right here right now. Digital is always going to evolve, I just have not seen quite the incentive just yet to dig into that piggy bank and not really sure how badly I want to rob it !! I'm trying to justify in my brain cells just what level it is that I really need vs want. And maybe I prefer a work station at that. Too much out there ! Still, I see myself arranging with one in software, guess that's the main goal. Any 88 key digital with USB or Midi will do it.
So that's my little hang up concerning digital pianos. At least you own one though !
I have two students with dink donk, dare I say, cheap DP's. They both complain or mention how heavy my grands keys are. Sorry guys, it's your keys that stink. It's fairly light actually, and I weighted them originally to more closely match my teachers Steinway grand way back when and more recently I removed some weight since I'm not doing any recitals any time soon on a heavy Steinway action. They are weighted half of what they were in terms of added wieght. So the point of this is it is important IMO, to get a digital with reasonable action in it, especially for students. My inclination is that even on the best digitals there is still a slight lack of action feel compared with acoustic. Even at that you do have to spend some money but even something like a Yamaha CP33 on fire sale will get decent action, just not the latest sound, though then you can use sound generating software to finish that off nicely. You just play through a laptop through a stereo with jacks in it or other sound system and make sound the best $4000 piano can't make using it's own sound system. That is until the $4000 one gets wired through the lap top and on and on we gooooo.....
If it sounds like I'm rambling, you should experience this from my view !!
David