Well, out of the ones i own, id say a silver surfer would vape some kief the best. Its wand can fit a nice kief pill and range of temps can get some nice vapor goin. I dont think kief is a good idea in ones with a ceramic element like the thermovape. It leaves ash behind which will gunk up those kind of devices over time. Browse some threds in the vaporizer discussion section, someone usually brings up blazing kief in the vape.
Vape on