Though I would say that the general shape of the Medium Lifter is just as symbolic.
Most Descent 3 stuff I've seen often had the Tailbot, or the Frag missle firing version of it.Again, not in the choices.
Out of the choices given I voted for the shield orb. My first choice would have been the Pyro-GX, but hey, I am kind of biased
I finally played Descent last night and really liked the extra life powerup the most. I just think it's cool.