Yes, there is a great Stereo GRAND Piano sound in the HD that you can load. This is a huge sample and as such, takes a few seconds more to load.
You also have 4 Stienway Grand piano samples in the Hard Drive of the AJAMSONIC upgrade. Piano sound is very subjective and depending on what acoustic piano you were raised playing (a Baldwin, Steinway, Yamaha ... etc), you will always have a preference of one over the other and many keyboard manufactures (apart from those who make acoustic pianos) are faced with a similar choice - of which to offer in their products.
Thanks,