Very nice, I'm not familiar with the piece, is it original?
People choose Pianoteq sometimes, and yours sounds pretty good indeed but when I've tried it (I always download the demo each time a new version comes out) the upper register seems just a hair "plasticky" and I always end up blending it with another sampled piano.
I know very well that piano timbres are perhaps the most subjective subject ever. You might try Pearl Piano from Impact Soundworks - just by listening to you play, I bet you'd like it.
nice job and cool video, too.
-Tom