Well I broke down and took advantage of the sale on the segelei zmax telescope V3 kit from varitube.com with a black carbon jwrap! Perry was very helpful and can't wait to get it! Now I just need to learn how it use it 
You won't notice much difference between a VV or VW APV and your current setup.........................
I think this is very misleading. I've used the twist, Provari, Vamo, Darwin and a host of other variable models. I've talked with several electrical engineers on the subject, even one who invented one of the top APV's on the market. Without getting into technical electrical engineering "speak", these engineers (along with my experience) support that Power Regulation and variable wattage is simply a more efficient and consistent means of providing power. Does variable voltage automatically adjust the power to the head based on the ohms of the head - no. Does variable voltage automatically adjust the power to the head based on the change in resistence of the head from usage - no. VW does both.
If money is an issue, I would not recommend spending several hundred dollars more for VW over VV. But if the money is in the same ball park, a VW device is definitely a better option than VV due to it's flexibility and consistency.
My point is that the op already has a vv device. based on my experience using a spinner and different apvs, there isn't a difference in quality of the vapor. An apv gives you different options, has a longer useful life, and allows you to better experiment with RBAs but electric power is electric power. A twist or a spinner is capable of providing consistent power to mainstream carto/clearos etc.
If the OP expects that vaping at 3.8v on their new apv is going to provide a better vape then on their spinner, they will be disappointed.
Why are there more suggestions after this?The VAMO is definitely the best option over any VV model in that relative price range. It is a power regulated variable wattage PV instead of just variable voltage. That alone makes it better than the other options. In addition it has a 5 amp switch which allows you to use any head on the market unlike most VV models that only have a 2.5 amp switch. Third, the batteries cost 2 - 3 times less than models like the eGo VV to name one example.
Good Luck with your search.
It's obvious you have never vaped a Darwin, easily the best Power Regulated variable wattage APV on the market. I (and many others) can see a marked improvement in the quality of the vape (over VV models), primarily based on the much improved consistency along with not having to continue to adjust power settings due to the change in the resistence of the atty/carto, etc. Anything that makes vaping more consistent and provides less hassle is an improvement. I've vaped an ego spinner and it CANNOT match a Vamo in consistency of vape or overall performance, plain and simple.
And why would anyone want to pay 2 - 4 times more for a battery, as they would with a spinner or have an under-powered switch that limits what can be vaped on it? I'm not saying the spinner (and similar models) are a bad device. Just don't see the logic of paying more for a lot less.
I think the Provari is one of the best APV's on the market but I cannot agree with you on VV vs VW. Variable wattage and power regulation is just a better method of regulating power and providing consistency. I've used the Provari, the Darwin (VW), the VAMO (VW) and several others. Having the APV adjust automatically (VW) to any ohm head I put on the Darwin or Vamo makes a definite difference in consistency and performance.
What are you on about?
Vision spinner 1300mah is around $25. Where are you finding these consistent VW APVs for $6 to $12?
And are you seriously recommending a Darwin to the OP? If they could find it, it cost 10x the spinner.
If you read my comments in this thread, I basically said buy a VAMO but don't buy it expecting the vape to be magically better. It just wont be. They both put out the 3.8v the op said they vape out without issue. Yes, it has some advantages, but it isn't going to put out more or better vapor from a carto or clearo than is the twist they have now.
I have to say that my vamo has been performing flawlessly for 4 months. I see no reason it will not continue, but it only costs about $40 so not much more than the twist the OP is using now.
True, the provari is near bullet-proof and has a great company behind it that will support the device for longer than a VAMO. However, if the OP wants to get his feet wet with a APV, the VAMO is a pretty low risk option. If 6 months from now he decides a provari is the way he wants to go, then his only cost with the VAMO is pretty much the cost of a twist, and hey, then he still has the VAMO as a backup.