I think you guys covered all the things I'd want, but just in case:
Parallel blade motion
Quiet (parallel motion should make it quiet)
Front tension release
Arm that raises and stays in place until you put in the new blade.
Magnifier light
Downdraft with the vacuum machine not noisy
Tilts the head instead of the table
Foot pedal (I don't use it but some do)
Adjustable stand
Wide table - depth doesn't really matter to me but probably at least 20"
Tool free blade changes - the Hegner needs a tool - not really a problem, but if we are wishing....
Tension control that actually holds the tension
Table to blade distance adjustable - for those rare things that are bigger, and so we would use the whole blade.
I like the slotted table on the Hegner. If I am having lots of little inside cuts on a wide project, even lifting the arm still make me stand on my head. With the slot I can remove the piece and blade with the bottom clamp attached and then slide it back into the saw. The top clamp attaches easily. This means more to me every day that it seems my vision decreases.
On table work shelf to keep blades, etc. handy. Also good for reassembling puzzles as they are cut.
Make the table and lamp movable from right to left side of the saw for us lefties.
Stops when blade breaks & arm raises automatically.
Durability - for what this thing will probably cost it had better last under heavy use.
I don't want much, do I?