The answer to which is best will be different for many people and IMO It also depends on what your looking to vape. Might sound crazy, but I like different tanks for different things, because I have noticed that sweeter juices I like with less wattage, and heavier juices like custards/cake flavors I like higher and warmer..
So for me,
-Kanger SBT tropical fruitty sweet juices around 24-26w
-Smok VCT Pro when I want more kick 40-60w
-Starre when I want the fullest thick nice warm clouds and flavor, 45w and up
Hope this helps,