Well, you've dove in at the right time my friend. Currently there are many AIO (all in one) mods.
Tube style AIO:
Aspire Pockex, Wismec Motiv, Joyetech evic AIO tube
Box style AIO:
Aspire Plato, Joyetech Egrip2, Joyetech evic AIO Box
These are just the ones that come into mind but I'm sure...