I am seriously convinced that the volcanoe is the best. I don't have enough money so I am settling for a vapolution.com vaporizer. They use the conduction method but employ glass on glass rather than ceramics or metal heating plates. Through this company the unit, tubing, car adapter, ac adapter, and fittings are all included with medium and large bowl sizes. The bowl is glass, the heating element is glass, and you can buy a glass mouthpiece and it is an entire glass vaporizer! it doesn't get much cleaner than that.

The whole package is $125 shipped from No. California. I am ordering one by the end of the month.