Don't get the Volcano Volcano - a weak choice. Volcano's Magma (a 510) would be OK and I strongly recommend manual. Or get a plain manual Joye 510 elsewhere and this PCC
Smart PCC Charger 510 Ecigcharleston.com in Charleston South Carolina .
I recommend 3 ohm Boge cartos on slim 510 and niteliteVapor.us has tan and white in addition to black in case you really think you want it to look like a cigarette (I don't - I use black 510 and black Boges)
What you cannot do with the slim 510:
a. cannot charge it on the Riva charger because Riva charger is over 400mA output and can damage slim 510's so I label my Riva chargers on both sides right where the battery screws in so I don't accidentally put a slim 510 battery in it
b. cannot use the LR atomizers or cartomizers that come with Riva 510. Slim ecigs need to use stuff 2.5 to 3 ohms, not lower