Alot of people have trouble doing the soldering, maybe because they don't know how to. But it is definetely better to fix it then replace the whole unit.
If you are affraid to do it, then go to any electronics repair shop, and ask them how much to replace a capacitor. I would charge no more then $30 bucks, since all it takes is about 15 min. of labor. I don't suggest you try doing it if you don't know how to solder, because you could end up screwing up.