If I had to choose between each of those models and the price points for each APV, I would choose the Sigelei V5. It has all the functions of the others and more, with the best quality of any of those mentioned, imho, and the best looking too, again, imho. Best APV under $100 in my opinion. I recently sold about half my APV's including most of the models you mentioned. Not because they aren't good, but just because they aren't the best for my personal preference. Regardless of what you get, please make sure that the basic features are included which will include variable voltage and an Ohm meter. Also, a 6 volt output is good, and needed occasionally. Also, you can get LED or OLED displays in this price point...the OLED being much nicer. Also, I like stainless steel for care, maintenance and appearance. Lastly, make sure you can use both ego threading and a 510 connection. Not each of the models you selected can meet these criteria, but I have found them important in my VapeQuest. It's all a personal preference thing, but functionality and looks do vary by device. Also, variable wattage is nice when you first start out, and are experimenting with different toppers. Eventually, you may settle in on specific devices and vw is less important. Good luck, happy hunting, best to you, power up and vape on!