quickest vaporizer?

I'm looking to buy a vaporizer that heats up quickly and doesn't require a lighter, any ideas?

here's an idea someone can play with....some kind of metal that is not harmful to humans when burned, that is extremely conductive, connected to wires on each side, and each wire attacted to the + and - one of those big (forget the volts exactly) battery (usually used in those bigger flashlights) on a switch.....when you turn the switch on it will get red hot and burn the weed.....

I've been looking at the vapir, vapureyes, vapordoc, and vaporbrothers vaporizers but it takes appoximately 5 minutes to heat up, doesn't anyone make one that heats up faster.

I take the little tube things out of my asma vaporizer and then use a light n take a puff...gotta be careful though dont wanna burn the plastic