Thank you for these recommendations!
As I delved into VST pianos, I realized that I simply do not have the disk space for a really good sampled piano. I had no idea that Pianoteq even existed, and it (1) sounds excellent and (2) takes literally 1000 times less space than sampled pianos. So this is probably going to be the one for me.
I'll get two instrument packs with purchase, so I'll spend quite a bit of time this week evaluating which ones I want. Who am I kidding, it's going to be the Hamburg Steinway D and something else. Probably the upright pack. That "ruined" upright really takes me back to my grandma's house.
Incidentally, playing a VST piano really puts an exclamation point on the quality of the Pro 3's key bed. It's short, but it's precise.