Right now there\'s no new technology out there to make a better piano sample. It\'s really a matter of refinement - go for a great piano with great mics, great placement, great preamps, and well-tempered velocities. Since pianos don\'t have different articulations, can\'t swell or add vibrato, you can only get so creative. It\'s not like you need \"the cube\" to paint the transitions between notes.
The one new cool technology will be the sostenuto pedal. My old Kurzweil PC88 supports it. Giga 2.5 doesn\'t. Hopefully 3.0 will.
Do the other soft-samplers support the sostenuto function?