I got my Hakko FX-888DX soldering station about 9 months ago and I've been really happy with it. First time I've had a precision temperature controlled soldering station and I bought it specifically to help with my decoder installs, along with a few extra tips.
For my metal models, hand-laying turnouts & track, rail joints and applying rail feeders, I'm using my 250W American Beauty resistance soldering station almost exclusively, only using an iron to tin things with.
Cheerio!
Bob Gilmore