Just picked up a new toy today from:
This is a Weller 100 watt soldering iron with one big plus. Its soldering temperature is regulated
. The standard tip is regulated at 700 degrees, other tip temperatures and tip sizes are available. Mouser also has a variety of soldering iron tips for this 100 watt iron. The iron appears to be very well made, including an iron plated tip.
After soldering up 24 A123 cells with an un-regulated 80 watt Weller iron, this is a big improvement.