I personally like the 30 watt pencil-type soldering irons from Lowes, that have an LED in the handle to remind me when it's plugged in. 30W is enough for nearly everything you'll ever do in RC, but a little too much if you're trying to repair tiny circuits on a PC board. Get a good stand for it also, Radio shack has them.
This is also a good way to start = http://www.radioshack.com/product/in...ductId=2062758