As someone who quit smoking using vapes, and has recently kicked vapes after a good five years – it's all in the vape. If someone was selling you based on "cloud-size", they were the wrong person to be talking to. They were a vape enthusiast. You're not looking for the "best" vape experience, you're looking for the vape experience that is closest to smoking.
For this, you'll actually want to go with one of the Big Tobacco-backed vapes, because it's also what they want – the closest thing to smoking. I suggest Juul or Vuse, both of which are backed by Big Tobacco, contain nicotine salts (fast acting like smoking), and have a similar draw and lung hit to cigarettes with smaller vapour than other devices.
You'll also completely avoid refilling and everything, as they're "closed pod" systems.
For five years, I considered (ritual aside, as you can do it discretely essentially anywhere) vaping to be superior to smoking in every way. Good luck.