Hakko 936 as many suggested is a great iron for most RC purposes, and not too expensive for a soldering station. I personally use a Hakko 937, which is more than a lot of people want to spend on an iron, but I think is well worth it.
another vote for the 936. I used to work at stereo shops, thats what we used. I have had one at home for several years, has done everything I needed it to do.