Absolutely agree with
jdetray and
NWP95501:
Like any quality tool, the up-front cost of a good iron is worth the fact that it will likely be the last one you'll need to buy. After messing around with cheap junk irons for so long, once I got a good one, the difference was like night and day.
I own this
Weller. I love the thing - I've owned mine for about four years now. With its adjustable temp, I've used it for everything from soldering 30 gauge magnet wire, to LEDs and decoders, to soldering HO scale track and connectors.
Though I have no direct experience with it, several sources I trust give very very good reviews to this
Hakko iron. It's $10 cheaper than the Weller listed above. On Amazon, it's also actually rated higher than the Weller! From what I've seen, Hakkos tend to have a cult following.
The key with both of these irons is that replacement parts (more than just tips) are readily available.
I think you'd be in real good shape with either of these irons.
Also, no matter which iron you end up getting, also get a
brass tip cleaner. These work much better than a sponge.
Good luck with whatever you decide!