PK and SF had some special SHOT show E2d's made up for the show. The special amounted to "SHOT Show 2004" engraving along with PK's logo on the bezel. I think some photos of these have been seen here and there.
Paul sent one to me for photo ops as well as some "in situ" testing over here on Maui. As is, this is a great light! I have taken it snorkeling numerous times and had it down to probably 15'. It has remained bone dry inside and the switch works great underwater. The MN03 lamp has proven effiecient for checking under coral ledges and in holes for critters in hiding. The E2d is not designed as a dive light nor are there any claims in regards to this application but to consider the light as merely water resistant doesn't do it justice, IMHO.
With the guarded clickie, domed window and "toothed" bezel, I think the E2d has taken the E2e to another level of dependability and utility. I can't comment on the tactical advantages as I know nothing about tactical but as a simple civilian, I do have a sense of my ability to defend myself being enhanced with the E2d in hand.
Just yesterday, in an encounter with one of Maui's versions of the feared Komodo Dragons, the E2d proved up to the task:
These somewhat smaller cousins to the Komodo can't chase dowh a deer for a meal but they can make a knat's life miserable, if not short. /ubbthreads/images/graemlins/icon15.gif
Joking aside, this light is a great addition to the SF line, IMHO.