My only current setup is a provari mini with a kayfun lite.
Was a pack a day smoker for 20 years.
Started with an Ego battery w/Iclear 30
Then purchased a Ego Twist (still used Iclear 30)
Then purchased a Kanger Protank 2 and a mini mvari from myvaporstore.com small mod that does everything a provari does for $39.99 but you can only used a flat top 18350 battery. Didn't like to carry my charger to work.
*MINI* MVari-Stick - BODY UNIT

Then purchased a Nemesis Clone with a patriot atomizer. Burns through e-liquid and batteries. Will leak in your pocket. Not good for on the go. Found out I am not a fan of dripping.

Sold everything and bought my provari and Kayfun lite. Fill her up in the morning, bring an extra battery with me. Vape all day long at work. Clocked 10 hours the other day on a fresh 18490 battery. You do have to buy an extension to rock other batteries. I have a Twins Extension $35 bucks. But cigtechs has one for $15.00 and provari makes an extension for 19.00.

Here it is in 18350 mode.

So my set up retail is $319.99 with out batteries and charger. Bought all used.
If you don't want to dump a bunch of money I would recommend an Itaste MVP with a Kanger protank 2. I am going to buy both the MVP and Kanger as a back up. $80-90 bucks!
You don't need to get fancy mods to get a good vape. Whatever keeps you from not smoking is what you should stick with.