I have a Hakko FX951, great iron but AWFUL interface! how they managed to put 4 buttons on it and make it the most user unfriendly is beyond me,
simple up and down buttons for temp would suffice.
I also have a Weller WSD80, that works absolutely fine, up and down to change temp, great iron, use this mainly for SMD.
I FOOLISHLY gave away a WESD51, wish I had kept it!