You'll probably love having a kamado. I don't have a BGE, but I do have a Kong (
http://grillagrills.com/grills/kong-ceramic-kamado-grill/) and I think they're very similar. In terms of flexibility, as others have mentioned, these things are tough to beat. It's worth shopping around in terms of size and price point, though, because there are some quality comparable products out there that may be as good or better and fit your cooking needs even better.