The 'classic' temperature controlled bench soldering iron, used in industry for years, and replacement parts are still available.
The Weller TCP irons use a unique temperature control mechanism, where the magnetic properties (Curie-point) of the bit itself control the point where the power to the iron is switched off. Each bit has a stamped in the end to denote the switching temperature, the black Weller should use number 7 bits, 700F / 370C suitable for leaded soldering.
An updated version of the Black Weller, this one using number 8 bits, 800F / 430C more suitable for lead-free soldering.
Maplin Temperature controlled
We have two of these. The elements have burned out previously and been replaced - this is not an easy fix, and when they next give problems replacement units should be bought.
Have a display of temperature, so can be adjusted for both leaded and lead-free work.
These irons do not have temperature feedback, although some may be able to be set 'hotter' or 'cooler'.
Hot Air Gun
We'd like to get
A flexible temperature-controlled (with temperature readout) re-work station with iron and hot air tools.