Jeff,
Believe it or not, I'm totally unfamiliar with Jack Casady's playing. I've seen him in films and videos, but managed to never be able to pay attention to what he was doing. I guess it's time to hit the used CD bin again. It would be difficult for me to pick a particular player, since there are so many who have used Alembics in the studio whilst playing lesser instruments on stage. I'm a big Entwistle fan, but also a huge Chris Squire fan (Trevor Rabin says Chris played his Alembic on Lift Me Up), a Stanley fan, a Phil Lesh fan, Mark King, David Hood, Tom Fowler... You get the picture. Speaking of the picture, I really hope you get one with the Wickershams. That would be really, really, really cool, and indicative of the familial code of conduct they do their business by.
John whose bass is in it's 23rd year!