I ran across an "upright piano" in Rapture today. I thought it was nice.

+1 for the Rain Piano
 
I don't know why the forum keeps deleting posts with a link to the Sampletekk product page for the Rain Piano MkII, so you'll just have to Google it. The product page has a good description of the VSTi and a couple of videos.

I recently upgraded from Komplete 5 to Komplete 11. Komplete 11 comes with some amazing pianos - 2 grand, 1 upright as well as the Giant and Una Chorda. "The Gentleman" is a fantastic upright that is almost infinitely tweakable. I still have Akoustic Piano installed, but compared to the new ones it sounds like a toy piano in a baked bean can!