I sort of agree with Mike on this. Having these guys back each year is like seeing an old friend now and makes the whole experience a little more personal. Sure, get new faces in as well, but I love seeing Larry, David Willis, Mark and Jason each year.
Plus, there is always new people to the hobby and guys that couldn't make it before.
Just as long as their is new faces, I say bring them on. The more, the merrier.