Pianoteq doesn't sound like a real piano
For example, Garritan Steinway have a Physical Modelling Sympathetic Resonance Generator that work better than Pianoteq. Good samples and good modelling = best virtual piano
I own a real Steinway.
Best Sampled Steinway : Garritan Steinway
Best sampled Yamaha : Alicia Keys
EW Quantum leap Piano don't have Sympathetic Resonance and the playing behaviour is wrong, Galaxy II piano and vintage don't have a real Sympathetic Resonance (the effect work only for one 8' and doesn't work with Pedal down/up correctly)...