Provari's and Vamo's are great, but I recommend definitely including some Vision or eGo spinners to get started. They're pocket friendly, which is something that 18650 and even 18350 mods are not. I love the way that Kanger T2's and T3's fit on the eGo stuff. And they don't leak even if they are upside down in your pocket. The Vision spinners come in a 1300mah version, a couple of those should last you 2 or 3 days between charges. The mods are great for when you get home or in the car.