Prob is you cannot find a darwin..out of stock last i checked
Why spend $200? A Provari is awesome to have but if you want to get similar results just get a KGO. At 45 bucks for 2 you have a system that lasts for a year or more per battery (that's 2 years!), and recharge your batteries every other day since they last for 11 hours a piece. They don't work with Dual Coil Cartomizers, and that sucks but the fact is provari users most often find that their "sweet spot" is just over what the KGO puts out. It can't be that much different. So, I vote the KGO for one reason. You can get a 5v passthrough for 10 bucks (electronstix) and by the time you jam a dual coil on there, you're exactly at that sweet spot that provari users so often use. Yeah, you're tethered to an outlet or a car cigarette lighter but it's there when you need it and it costs 10 bucks versus $200. That's my 2 cents. If you want to know more about my position you can click on my name and read my blog.
Similar results when you have "exactly the right" resistance coil or coils to suit a particular juice.
I know that you like the kGo battery, but I do think you're going a little overboard in your promotion of it. I think it's fair to say that while not needed by most people to get a perfectly satisfying vape, variable voltage devices can and do provide a better vape than constant voltage devices do, except, as I say, when the CV device is matched with just the right resistance coil. I hesitate to even say "coils", although it's probably fairly accurate to say that a battery like the kGo can give a fine vape with low-resistance dual coils of 1.5 ohms, but even at that, you're down to around 4.5 watts per coil.
Additionally, although I don't even have much personal experience with it, I have reason to believe that arriving at a given wattage per coil through higher volts and higher ohms will give a better vape than the same amount of watts per coil achieved though lower voltage and and lower resistance. With a 3.0 ohm single coil, the kGo would put the coil at the same, relatively marginal wattage of around 4.5.
So that, in essence, is my answer to the question you just posed - "why spend $200", etc. I think it's also useful to note that one needn't spend anywhere near that amount of money to get a feel for some of the potential advantages of using a variable voltage device. A $29 Joyetech EGo Twist would be a nice device to play around with, with voltage variable between 3.2 and 4.8 volts. Or a re-branded Lavatube 1.5 like this one, for $70, including batteries and a charger:
VA Variable Volt Mod Version 1.5
Why spend $200? A Provari is awesome to have but if you want to get similar results just get a KGO. At 45 bucks for 2 you have a system that lasts for a year or more per battery (that's 2 years!), and recharge your batteries every other day since they last for 11 hours a piece. They don't work with Dual Coil Cartomizers, and that sucks but the fact is provari users most often find that their "sweet spot" is just over what the KGO puts out. It can't be that much different. So, I vote the KGO for one reason. You can get a 5v passthrough for 10 bucks (electronstix) and by the time you jam a dual coil on there, you're exactly at that sweet spot that provari users so often use. Yeah, you're tethered to an outlet or a car cigarette lighter but it's there when you need it and it costs 10 bucks versus $200. That's my 2 cents. If you want to know more about my position you can click on my name and read my blog.
I recently just got my kgo, but when it dies I might just get another one. The Volt is sexy and all but I don't know if I can handle the low battery life. The Provari is a beast and I'd love to toy with the voltage to get different levels of throat hit but it looks bulky. The kgo has a decent battery life and is a mid sized e cig, plus it's only $43. The volt is $60-70 and the Provari is $150 not including the battery and accessories.
Part of me wants a Provari and part of me wants a smaller e cig the size of a real cig. I know the battery and vapor output on those suck, but I miss how light a real cig feels and not having to push a button to smoke/vape.
Do 510 cartomizers work with the Volt?
Variable voltage lets you put just about whatever wattage you want to a coil or coils.
For a vaper on a budget, that wants variable voltage, the Lava Tube is an option. I have one, and I love it frankly. It'll run you about $100 for a basic kit, maybe $80 depending on where you buy. I think the collective opinion is that it's not as good as a Provari or Darwin, but it also doesn't cost nearly as much. Take that into consideration.
Although, if you really like vaping low res or duel coil, meh, I'm not sure VV is the way to go. If that's what you're into, if it were me, I'd just get an Ego clone with the highest mAH I could find. In fact, you know what, before you decide your current hardware isn't enough, why not go ahead and try low res and duel coil?
I justed started vaping a few weeks ago and love my $43 KGo. I know it will only last a few months and I'm already wondering what I should upgrade to. I keep hearing good things about the Provari. I'm just concerned about the size of that e cig. So what's the best e cig under $200?