I have
this one from Regent. Each head has a 250 and a 500, so you have unlimited combinations from 250 to 1500 watts. I looked for a long time, and chose this one becasue all the tubing is 2" which makes it a lot more stable than the standard ones you see all the time. The only thing I don't like about it is that the heads don't tilt down, so you have to lower it to work on the lower areas of the car. And it'll heat up a garage real well, too.
