Hey Redkitty. Congrats on your first steps to a smoke-free life. I am a Halo user as well, and I think the G6 is a fine product, as far as cig-a-likes go. I picked the Triton tank system because of my (very) heavy smoking history, but IMHO the hardware doesn't matter as much as the juice you put in it. Like my predecessors have said, get the highest mg/ml they offer (24mg if I recall,) and get rid of all your old smoking paraphernalia. If you don't have a lighter or ashtray nearby, the temptation to smoke is greatly reduced.
Also, if I could make a recommendation, pick up some of their new mini-tanks for the G6. They're cheap and reusable and will give you a much more satisfying vapor than the cartridges. A couple mini-tanks and a few bottles of juice will run you less than $20 and last you quite a while.
Good luck and keep us posted. We're always ready for a new fellow ex-smoker.