Hi, welcome to ECF. There are tons of factors to consider when buying an e-cig, but it would be helpful to know a bit about your
vaping preferences and what you are looking for. How much are you smoking? Are you interested in more clouds and power, or a smaller, mouth-to-lung setup that has less power, less clouds, and you use higher nicotine in it. Do you want a removable mod or one with an internal battery that you charge via USB? Do you want drop in coils? What kind of battery life are you looking for, etc. I honestly can't recommend anything from such a broad question as I might be pointing you in the wrong direction.
Vape setups are as individualized as the user. You may want to read some posts and pinned threads in the new member information forum (it's a subforum above this one) to get some general ideas about
vaping and what you think might appeal to you and lest us know so that we can help you better.
Welcome to ECF!
Anna