I can definitely appreciate the devotion to resin; I have a 1:1 replica of the MACO rifle from Enterprise that's fully cast in resin, and it's incredibly heavy and beautiful.
A 2-sided network map sounds best to me, even if you only want one side it just adds more value to it by having a potential dual use.
Even if smaller diecast ships are out of the question, what about using resin for them? I'd love to see 3"-scale resin versions of the Earth fleet, or Asgard fleet, or Goa'uld fleet. Perhaps each as a set in a display case?
Also, in regards to the bumper stickers, any chance of magnetic versions?