Hmmm - I just use something basic (Certina DS Pilot):
http://www.watcharama.com/ce001.htm
The ability to see the darn thing in the dark should not be understimated. Used to use the seiko military one, but I still needed a torch.
For some reason I've never needed a stopwatch or an E6B (and who needs a tachymeter anway?). I would find the day of the week slightly useful as well, but I have no plans to change this one, although they have versions with stopwatches.
Phil