Is the firefly available in sil-poly again? The Lightheart Gear website currently shows them available in one color choice.
I have done a lot of comparison tent shopping over the summer and the firefly a great choice - probably the best for my needs. However, I don't like silnylon material for a number of reasons and don't want another silnylon tent. I have sil-poly tarps and like them - no problems with durability.