Hi,
In the course of building a Seduction and then recently adding in the C4S kit, I (soldering newbie) went through 3 soldering irons -- including one from Radio Shack which, like everything else I've ever bought there, stopped working after the first project.
I finally went to Fry's and bought a Weller HE35 iron, and all I can say is that had I found it first, I'd have had a much easier time building my Seduction the first time around. It wasn't the cheapest iron (39 bucks) but it's such a pleasure to work with: a nice, hot, smallish tip, and the solder flows beautifully.
Just passing along some hard won advice to other kit-building newbs. :-)