I recently bought Pianoteq 8 - never owned any of the previous versions. According to your comparison, there is a huge improvement. The Steinway D sounds quite electronic in Pianoteq 7, whereas the sound of version 8 is much more natural. Still, I prefer the various sampled Steinways over Pianoteq's Steinways, but I do play the Pianoteq 8 Blüthner. I think that is the best Pianoteq instrument, and I like Pianoteq's unbeatable responsiveness.