I have always been a fan of 30 watt mods. They are exactly what the average vaper needs to push 90% of whats on the market. They are reliable and cheap.
Now here is a mod made by Hcigar. I like the over all design and especially buttons on this mod. Unlike smaller mods in its category that use an internal lipo battery - these use a replaceable 18650. Pushes 30 watts and can go down to .2 ohms .