The Yamaha CP-88 has graded hammer action and is supposed to be the closest thing to a real grand anyone has done. So say keyboard buffs on a facebook group anyway. None of the local stores have it, though. Closest one available for demo on the floor is in Houston, so I haven't tried it out.
I've listened to a lot of its sounds online. The piano library is not as extensive as you'd hope for the price, but what it has sounds amazing. It's nowhere near as versatile as a Nord Stage piano, which are insanely popular with professional musicians, but it duplicates most of the main features normal people use at half the price.