[Elecraft] KPA100 Tool question

[Glenn Maclean]

On Tuesday Aug 13 I will have orbited the sun 50 times. In celebration for
being 50 my family is giving me the KP100A. I have down loaded and read the
manual in preparation of building the amp. I noticed the manual recommends a
soldering gun to solder the power transistors. I have a good temperature
controlled soldering station. What kind of solder gun is require? I need to
purchase a soldering gun for other shack projects. I noticed Sears has
150/230, 100/140, and 100 watt solder guns. Which one would be a good all
around gun to have and would work well for soldering the power transistors?
Does it really matter?

Thanks,
Glenn WA7SPY