[Alan Douglas]

Wattage isn't as important as the mass of the copper tip, so you can get a lot of heat into a heavy terminal quickly. Temperature control is nice so you don't burn up the tips idling. But the original soldering was done with a 100W blunderbuss, so anything will work.

I personally use a temp-controlled Weller with a rather heavy chisel tip. At work I have one just like it, with a smaller conical tip that will do surface-mount stuff.