Sampleson has recently offered the virtual piano MetaPiano, which is not a sound bank but a model of a Japanese grand piano. A total of 64 timbre component groups (hammers, release, key pops, main timbre, resonance, etc.) were mapped and recreated by spectral modeling. You get controls for mechanical noise level, release, velocity curve, master gain, as well as impulse response based reverb. The advantage of modeling is its featherweight of 60MB, and its low consumption of CPU resources.

MetaPiano is available on Mac and Windows, in AU, VST3 formats and as a standalone application. Currently at an introductory price of $59, it will subsequently increase to $89. Note that future models are to be expected. All information can be found on the Sampleson website.