Okay - I was going to be a DB because I've tipped a few. Guineahill gave fantastic advice though. I have to say, I never understood folks who had to have it look like a cigarette. I've taken every drug and device under the sun, I've actually done acupuncture. I didn't care if if I have to place something in my ear and flap my arms to get me to stop smoking, I would do it.
So get the 510 with a PCC, there will be a learning curve, it will sometimes be a pain, if you need to, by all means keep a pack of butts next to you while you play and figure it out. My entire point is, when you find something that hits the sweet spot and puts you in control of the monkey instead of the monkey all over you, its truly liberating. Open your mind, you will be so amazed...
Once you start getting bored with that, and you will, play with the mods. The amazing thing is after a week or two, if you can drop the analogues, you'll actually forget about the monkey and become obsessed with the e-cigs (that's a good thing).