Good point! I use all types of juice delivery devices, but the good ol' reliable Boge cartomizers are still a very cheap and effective way to vape hassle-free. They don't leak unless you over-fill them (just blow the excess out the bottom), and they last me a couple of weeks before the draw starts to tighten up some (YMMV).
I buy "bulk" and get 5 boxes of 'em (25 cartos) from SureVapes.com for $23 shipped. You can mix-n-match boxes of low or high resistance, standard or XL, & black or stainless steel.
BTW, if you plan on using a cone on your device to cover your carto, avoid the black Boges...the black "finish" is a vinyl wrap, which adds girth and causes the carto to fit too snugly through many cone openings, sealing off too much of your intake air in the process.