Everyone who comes to the world of ecigs undergoes something of a “journey” while finding the right solution for them. Having gone through this all relatively recently myself, maybe I can help. First of all, you should read the ecig forums at www.e-cigarette-forum.com. They have good advice in the sticky posts in the New Members section.
The most important thing to note is, pretty much anything you buy over the counter at a gas station or walmart or mall kiosk is going to suck. And a lot of online ecigs suck, as well. The thing is, a lot of places have a proprietary cartridge system that they use to keep sucking ongoing costs from your wallet, similar to cigarettes. IMO, the best solution is to get a solid, affordable, modular ecig that doesn’t require you to sign up for proprietary parts. I personally have experience with the eGo mini kit and 510 auto & manual battery kits. In those, the “cartridge” is not proprietary and does not contain liquid. It’s also interchangeable and could be either a cartomizer, atomizer, or clearomizer depending on your preference. You can get empty cartos/attys/clearos (as they’re called) super cheap through online retailers like MadVapes, then just fill them with the liquid of your choice and vape away. However, word of advice: I’ve tried multiple 510 ecigs and an eGo mini kit, and didn’t have a very good experience with any of them (they worked pretty well, but fizzled out within a month or 2).
IMO, the truly challenging aspect of approaching ecigs in a more modular way is to find an e-liquid you like, and stick with it. I personally would recommend either Irish Mintz or Strawberry Daiquiri from MadVapes, or Vapin’ Chimp from Heather’s Heavenly Vapes. But obviously, it’s a very personal thing. Everyone else seems to love RY4, and I think it tastes terrible. And keep in mind, a lot of liquids may taste crappy at first, but be really good once you “steep” them for a week by leaving them out uncapped (it helps the flavor mature).
Anyway. I’m waiting on a kGo ecig kit right now (should arrive today or tomorrow) that cost me $44 after a coupon code and shipping. It comes with two batteries, two clearomizers (which are like a small tank with a mouthpiece that you put e-liquid into, then inhale from), a usb charger and wall converter… basically everything you need to smoke an ecig, except the liquid. It looks great, and according to reviews should last at least 10-12 months. I can send you the link to read the reviews, if you’re interested and choose to PM me. I’m not affiliated with them in any way, I’ve just gone through MANY forum threads and read piles of recommendations, and the kGo keeps coming up. I’ve watched videos of people vaping with the kGo, and it seems to be everything I’ve been looking for. Eventually I may upgrade to a variable voltage (vv) model of ecig, which can help get the most out of your juice, but they’re kind of expensive and more advanced than I require anyway.
So, that was a lot of information. Yikes! But if nothing else, just read the ecig forum before you make any concrete decisions. You can also sign up with an account and ask this question over there. They give really good advice, and I guarantee they’ll steer you away from the choice you’re about to make. Good luck 