FIRST of all, let me say this, do NOT stress yourself out about the switch to vaping. The whole idea of vaping is harm reduction, stress itself is harmful to you, and stressing out about vaping will make you want to smoke. Don't worry about it. You don't have to be one of those people that immediately switch to vaping. Don't count the cigarettes you have, count the cigarettes you DON'T have. That's them most wisdom I have ever heard in the vaping world, no idea who said it first.
I only say this because when I started making a concious decision to switch to vaping, every time I broke down and smoked, I felt bad, which caused me to smoke even more. Don't do that to yourself.
You've been smoking for awhile (I assume) so if you smoke while you make the transition to vaping it's not a big deal, just releax and try to make vaping a positive in your life, not something that causes stress and guilt whenever you slip up and smoke.
Now that I've got that out of the way:
If you want a cigalike (something that's close to a cig in form) the Smoov and Volt are probably the best units you'll find. Njoy makes a product called the Njoy King, which in my (and MANY other's) opinion is the most cigarette like device you will ever find. The thing is soft, not hard metal, it's light weight, and the flavor and feeling you get is incredibly close to a real cigarette. The juice used in the high-strength (robust) is 45mg which will really satisfy those cig cravings.
The problem with them, is that they are $8 each and only last a few hours of heavy vaping. Not something you will likely use as your main vape, but it's something to keep around incase you really want a cig and your current vape just isn't doing it for you.
If you don't mind stepping up to a larger device, the eGos are a great middle ground. They are about the size of a medium cigar. They will be able to provide more power and battery capacity to whatever atty/carto you are using. In my experience they'll last longer than the cigalike batteries too.
A Smoov or Volt with cartos is a great device for the cigalike crowd, an Ego with some cartos will be good for someone just getting out of the cigalike form. Obviously there are some much higher performance and higher quality units out there, but I'd imagine you don't feel comfortable getting into those at this point, which is perfectly fine. Don't get vapers envy, you do not need the newest device to provide you with a quality vape.
It's just like cars, gettting from an 18 second car to a 16 second car is MUCH easier than gettting from a 10 second car to an 8 second car. You aren't missing as much as you might think.
Basically, whatever works for you is the best device. If you like cigalikes, get a Smoov or a Volt, if you don't mind going a big bigger get an eGo. If you want to go even bigger as time goes on, then cross that bridge when you come to it.
Good luck friend, I wish you the best!