Chas
From your description I would recommend the Roland FP90. There are many DPs out there but I have this one so I know it well. Its where I go to get back to basic playing.
Sounds- not a million but just what you need with and extremely editable Grand Piano. I haven't done much with the editing as I'm very happy with the stock sound. I've have saved some nice layers and splits .
You can also download alternate tunings. I did one called Jazz Piano, brighter and cleaner piano sound for fast playing.
Keybed - Rolands best with wooden keybed and imitation Ivory cover. Not a very heavy action and very playable. Also makes the instrument heavy but its just for my studio.
Speakers- I've said it before I hate onboard speakers BUT these are amazing. And it can get as loud as a good Studio Upright. I din't bother playing thru my studio speakers as the built ins are that good.
Looks smooth and elegant with just the right amount of buttons which are recessed .
Good luck shopping