I'd suggest finding a Musicman dealer in your area and try all the models you can. The Luke neck is different than the JP which is different than the Axis which is different than the AL which is different than the Morse and so on. Find what you really like and then wait for the Sterling model. Story is they will be releasing more models as the first runs sell out and the whole thing catches on.
Part of me would love to have a Sterling Silo but then the real deal 25th Anniversary is totally drool worthy.
If you choose a Sterling I think you'll be happy though.