Not fussed about it resembling a cigarette,
In that case, maybe look at an Ego C, T or whatever. Don't worry about the little cartomizers as the capacity is small and they burn too easily and can be messy to fill until you get the hang of it - get a tank cartomiser or at least a packet of larger capacity (1.6ml) clearomisers.
The larger batteries are definitely a plus (compared to the little ones that look like cigarettes) and the larger
tanks keep you going longer. Being able to see the contents avoids running them dry and burning them. If you are a moderate smoker and get the small kit then most likely you will be back at the store buying something larger after a week anyway.
You will also need a bottle of e-
juice in your choice of nic content and flavour, and something to fill the tanks with - either a syringe with blunt needle or a needle tipped filler bottle.