hmm, since you have a VV3, an mvp wouldn't be much of an upgrade, except bigger batt. Right now is a pretty good time to upgrade. And can find a excellent selection of 30-50watt devices for $100 or less. Best thing to do is check out the sub forums, see what is vape possible right now and what is coming out. Also you'd probably want to look for a re-buildable atomizer, rba, that would best fit your style of vaping.
The best mod in the world won't make your vape any better unless you have an atomizer that can handle the power, and learn the skills to build and maintain it.
I was a smoker for 30 years. Been vaping for one year now, in my search for that "something missing" in my vape, have gone the way of the rba, DIY juice, and some really bad azz gear. I now feel secure that will never ever go back to smokes, that would be a major downgrade compared to the vape that I have grow to enjoy.
Vape long and Prosper.!!!