+1 on the high vv/vw box mod.
With a mechanical mod the only way to "fine tune" your vape is to build a new coil. With a high vv/vw regulated mod (and its buck/boost circuitry) you can "fine tune" with a push of a button. On a mechanical mod your voltage drops as you vape, with a regulated mod this does not happen. Your first hit is just as good as your last hit.
A high vv/vw mod is a lot more versatile than a mechanical mod (not to mention safer, less upkeep, etc). The beauty of a high vv/vw mod is that you don't have to build low sub-ohm coils to get a great vape. In fact, building low sub-ohm works against you. Higher ohm coils use more wire which means more surface area to vaporize juice. This increases both heat and vapor production.
With a mechanical mod you increase the warmth of your coil by building lower ohm coils. However, the electronics in a regulated mod boosts the power coming from the battery so the ohms of the coil no longer control the warmth.
Here's a good thread on the subject:
My thoughts about sub-ohm and latest VV/VW devices...
Also check out State-O-Flux's blog on the "Steam Engine":
Steam Engine: From Basic Use to Advanced Features