I almost pulled the trigger on the Vamo. The pulse modulation concerned me, but I didn't want to drop the money on the Provari until I am sure this is something I am going to stick with. I am going to go with a mech mod + the crown. This should give me the same performance as the Provari for half the cost. Minus the nifty display, but giving me the option of low resistance vaping.
Be advised that the kick has a 10w limit. Most SLR setups take advantage of the fact that a mech has no limits and often will be hitting in the 16+ watt range. You can still use your kick, you just can't use it when you are needing more than 10 watts.
PS Everything except the Darwin and the Provari uses pulse width modulation (the Provari does as well, it's just better filtered)... it's the way things are in VV/VW.