My primary holes are 0g and my secondary are 2g. I don't plan on going any bigger.
My helix was punched at a 2g with no plans to stretch it. It really hurts to stretch cartilage and I like it the size it is.
Be patient. Trying to stretch too fast and taking short cuts is how you end up with tears and "cat butt" ears. I've seen split lobes in person. They're gross and you don't want them.
Good luck! and check out this site they have some of the BEST jewelry out there at pretty good prices (they also have cheap second rate stuff) as well as a message board you could join. I forgot to add that they have all sorts of discounts available for ordering a lot and writing reviews of jewelry.