[svenw]

If you don't mind buying a used iron buy a metcal soldering iron (the ps2e power supply with hand piece and base can be had for around $100- $200 on eBay). The way the iron temperature control works is through the tip, so a brand new tip and you have essentially a brand new iron. The tips are a little bit more expensive (around $20 new) but you only need a few kinds and they last longer than any other iron I have uses.

As for soldering smd components just buy a good flux pen and make sure to use it. It will make a world of difference. Don't worry about getting a fine conical tip, as it will take forever to solder anything. You also won't be able to get enough heat down if you are soldering to ground planes. Instead buy a nice size (1/8") chisel tip and treat it with lots of care.