I have cut grundgeboard, chipboard, felt, everything with my big shot. I didn't go with a vagabond because they can cut the same thing and it wasn't worth it for me to pay $150 more to be able to push a button instead of turn the crank. Plus then I have to make sure it's always near a plug in.
Don't worry too much about the proper "sandwiches" for the various dies. It gets over whelming to try to figure it all out. Just start playing. It really is easy. Once you get it, you'll wonder why it seemed like such big deal figuring all that out before.
I wouldn't about which whether it will do everything. The way things change, someone will invent something it won't be able to do someday anyway. I think it does the most, and is the best built.