Hm, just listened to the samples. Nice damper noise, and it sounds like the sustain pedal actually models string reverberation rather than just sustaining the notes longer. They're definitely a step up from the pianos which came with Logic Studio, at least (NI was nice enough to provide the original MIDI files so I could even do a side-by-side comparison... I wish more softsynth vendors would do that).
Also, Garritan doesn't have a sample of the pianos alone (so far as I can find on their site anyway)
Actually, I really like the sound of the NI Bechstein. Hm! I believe I shall be picking this up after all. Thanks!