Lumis...PKZ's thread is excellent. Take a look. That being said, I use a few different tanks on my ProVari. I use a MAP, a JonBoy, and a VPX. They are all good, but you must be willing to put some time into them. They need to be cleaned, and dry burned. To do that, I tear them down completely and when they need to be refilled, I pop the top off and fill it up. I would say none of them are hassle free, but I like them enough that I am willing to put the effort into them. Good luck with your decision.