I know many have advised you to go with the Kgo kit, but I'd like to put in a vote for the eGo C twist kit. I have it and love it. It's very easy to use and the nice thing is you can use it at the standard voltage until you get used to it and then play around with the twist bottom to adjust the voltage later on when you are more comfortable with the whole
vaping experience. I started with a stick cigarette, then moved to an eGo C and now have a Twist. I couldn't believe how much better the vaping experience is with the Twist.
Much of the reason you see such a difference is that the eGo-C is such a bad system in the first place, and only 3.4V. It's less powerful than your stick battery was. The C tank system is terrible compared to any unregulated 3.7V battery and a good carto/clearo. That's why most people junk it and switch to clearomizers.
The problem with the Twist is that you need to buy two of them at a time unless you have another e-cig to use while one of them is charging up. They are also ridiculously long in the 1000mah version and the version that's the same length as the Kgo is only 650mah. If you want a large variable voltage, you can get a kit of the latest Lavatube, a FULL range VV with TWO batteries for the price of two twists. And, to top it all off, the Twist is disposable, unlike the Lavatube.
So, you can pay $60 for two low voltage, disposable Twists or $60 for a full range lavatube kit that's not disposable and has a battery that lasts twice as long between recharges.
Two Twists: $60
Lavatube :$60
Twist Range: 3.2V-4.8V (1.6V)
Lavatube Range: 3.0V-6V (3.0V)
Twist: 1000mah/battery
Lavatube: 2000mah/battery
Twist: Disposable
Lavtube: Not Disposable
Replacement battery cost Twist: $30
Replacement battery cost Lavatube: $10
Twist Amp limit: 2.5A
Lavatube Amp limit: 3.2A
Twist Volt select: Dial and tiny numbers
Lavatube Volt select: OLED Digital Display
Twist Battery level indicator: None
Lavatube batt. indicator: Digital bar graph
Twist resistance display: None
Lavatube resistance display: Digital ohm display