I'd have to list my rasps as the top on my list, having a really good rasp makes shaping a neck so much easier.  I really enjoy each one of my tools since they are all really good except for one which is where my question comes in at the bottom of my post.

Rasps

small japanese handsaw 

fret slotting miter box and fret saw

drill press

band saw

belt sander

oscillating spindle sander

router table and router

collection of fret files

Now here is my question.  What is a really good soldering iron?  I got mine from Radio Shack and I'm not fond of either one. They are slow to heat up and lose their heat quickly so it is not possible to move quickly from one joint to the next.  

In my daily life I do furniture type repairs to piano cabinets and one of my daily tasks is doing "burn ins" which is using a hot knife or a "burn in knife" to melt and apply fillers to voids in finish or wood. I don't have any problems with my burn in knives in terms of being able to move from one repair to the next to wait for it to get hot enough again.  So, who has a killer soldering iron?  I want something that is professional quality.

Charlotte