Trust me if you are de-soldering on a regular basis you do not want to use a standard non adjustable soldering iron. Unless you like lifted traces/pads ,then do what you want. I hope you can use 63/37 solder because most other is junk.
you misread my response,
if you aren't doing any work that requires any finesse and your work is irregular or requires the rather more brutal approach, then there are really cheap irons that will do. (no sense in blowing a quarter of a grand on a really fancy reflow station if you're trying to replace electrolytic caps, on one job.)
if you require delicate work, replacing fine components, then not only might a different tool be better it might be impossible to actually do the work you want to do with a big soldering iron that you picked up in the plumbing section of a DIY store... or if you're doing the work regularly then a better tool will save you time, multiplied by hundreds of jobs...
by the same token if you're only interested in a line of work fixing tombstoned SMD resistors, or dry joints then you don't need an iron at all and what you actually want is a re-flow oven...
I've worked with non-leaded solder for over a decade (only on a hobby basis) generally I find the American aversion to it over ratted,
yes leaded solder melts at a lower temperature and flows easier, but non lead solder is perfectly easy to solder with, more difficult yes, but not "tricky" or "impossible" and doesn't lead to "impossible tasks" or "bad jobs" or any of the other things I've heard people say about non-lead solder.