Since you want to get off ecigs quickly I suggest you go with an ego/riva to begin with. You could start with another model that looks more like a traditional cigarette, but there's lots of muss and fuss with them. These type models will, IMO, give you the best chance at quitting analogs. I wish I would have went with the eGo/riva to begin with.
Beyond the kit, it is your own choice when to go with cartridges and atomizers or to use cartomizers. You can buy cartos prefilled, or you can fill them yourself with ejuice. It can be overwhelming, but you did something that I didn't do. Rather than just read through all the post you asked in a thread. I would have saved myself alot of money.
That is a general recommendation, What are you looking for in a PV?