These days I wouldn't praise a Kurzweil for anything other than VAST and even at that it's getting old. You can't keep praising them for the same technology for every you know. As an OASYS user I'd have even less interest than most as the OASYS is a far deeper workstation that even the hard core programmers would find themselves left with their heads spinning.
VAST in my opinion is also a wasted technology on a range of keyboards that carry very dated specs and high price tags. The PCM data even sounds dated for many sounds and is likely very limited as they won't even tell you how much the keyboards have.
VAST is also not exactly utilised when producing real-world sounds. So... what's so interesting these days about a Kurzweil ?
A triple strike Piano sound ?
Well, there's plenty of better options these days in every accept of what Kurzweil have to offer. They don't really have a lot going for them.
Heck even the factory sounds on a Tyros 4 put any Kurzweil to utter shame. It's old technology.....yawn.
James