I highly recommend a Vapolution Northern California herbal vaporizers- Vapolution Vaporizer
I've tried the Vaporwarez, Volcano (great unit, but $$$), VaporGenie, homespun devices and the Vapolution is superior in most ways:
Taste - Vapolution! with glass on glass for supreme taste - no metal screens
Warm-up - Vapolution in 4 minutes!
Service - unbeatable - they ship QUICk and back it up and are very kind
Design - slicker, smaller and portable! includes car adapter along with 2 whips, 2 bowls (one small, one large (not quite large enough for me though))
It stays clean too. I just cleaned the whips and bowls for the first time yesterday and I've had the unit for a few months. The unit itself doesn't need cleaning. And the oils from the whips and bowls are incredible!!! Weeeeeeeeeeeeeeeee....
Good luck and happy vaping! Vaping and Vapolution were the Best decisions of my pot inhalation life.

If your in a richer market, I understand the Vapezilla is the Cannabis Cup winner and is gooood also.