I don't believe there is a best PV, but with that said, it depends on what your looking for. For me, I prefer cartomizers. The reason for this is the because there is less to deal with. I didn't like the cart and atomizer deal. I did the blue foam mod, the tea bag mod and the non filler mods too but could I didn't want to deal with all those issues that come with each mod. for example, my blue foam mod, it was good when you had the right amount of blue foam, the problem was when you didn't have enough or when you had to much blue foam, same thing with my tea bag. I wanted something that I didn't have to think a lot about and it just worked. So I use the 902 from Modern vapor with the 902 cartomizers. Less to think about, just drip a couple of drops into the cartomizer and your good to go. I also have an evo and sometimes I wanted something more discrete, that's why I prefer the 902 with the cartomizors. I hear that Vapor for Lifes's PV are very good too, but I already purchased the 902 and I love that model, but only with the cartomizers. I can't deal with the cart and atomizer combo or even the drip method. Don't get me wrong, I love the taste from the drip method but i just don't want to deal with dripping, especially since I do most of my vaping in the car. That's my 2 cents.