I've used a Hakko 936 for years, for airsoft and for anything else that needs built, repaired or modified. It has a fine tip good for most things and an extra fine tip handy for soldering to SMC pins when installing modchips on PlayStations and such things.
The tips are easily swappable and the ceramic element is replaceable (although I've not needed to in the last ten years or so).
It's built like a tank and looks like a tank.
The FX-888 looks like a child's toy, but I'd guess it's still a good model (and heats even faster than the 936), although succeeded (Hakko's words, not mine) by the FX-888D.