"Bob D." wrote:
(snip)
Soldering Iron - I'm looking for something decent that won't burn up tips
when left on for hours on end. I would also like interchangeable tips to
range from heavy duty to fine soldering.

I bought my son one of these and he is very happy with it.
http://www.tequipment.net/Hakko936.html

--
John Popelish