Tom, I agree with you. These instruments are high on the food chain....likely better than anything Yamaha can put together with its mega voices....my opinion.

I have acquired GPO and Colossus and plan on getting Garritan's Jazz & Big Band library.

This is kind of an interesting trend in that these libraries are relatively small in terms of byte size but sound very good indeed. To get the full features out of such sounds you need to do alot of key switching/button pushing to change articulations as you play. It is a nice alternative to what is out there.