Many of the libraries for Giga work great live.
I\'ve had great luck, in different settings, with Trachtman-C, Post Grandioso Stienway-D, The White Piano, and Bardstown Bosendorfer.
The pianos which are set further back on the soundstage, i.e., the ones with built-in ambient or distand mic\'ing, tend not to work as well. Of the ones I mentioned, the Post Steinway is about as \"distant\" as is practical in my experience. Otherwise, the sound tends not to push into the space.