Why not the Istick???? From what I have seen it has the same issues as the MVP 2, with the performance of the NEW MVP3. Unless you are assuming that all issues the MVP2 and even the Istick have been addressed in the MVP3. From the research I'm doing, trying to make this same decision. I find that ALL devices in the MVP/Istick/vamo/DNA clone price range <$60 Ebay, have nearly identicle pros and cons.
Here's where I'm at right now. Have pretty much determined that I have lots to learn about Vapeing. I have to learn about making coils and maintaining a RBA, whether drip or tank. I ask myself do I really need to toss the learning curve of a VV/VW device into the mix? So I'm leaning to a Mech, maybe with a VV or VW kick. This way I get the stable vaping of the regulated device, and the ability to concentrate on making proper coils and such. When I am ready for More wattage, or sub ohm coils, Then maybe it will be time to start looking at VV/VW devices, in the minimum of 50w range. For a topper I'm thinking a Kayfun with a Nano tank. Drippers for me are out of the question, I want to fill it and forget it and be able to carry it in my pocket.