For those of you having trouble finding the presizemodels website, you can find the address in my profile. I should have mentioned that in the first place. I'm really enjoying this thread, bridges are one of my interests. The flexible girder bridge is a little mind-bending.
I'm working on a more prototypical open deck for the Lionel extension through-truss bridges, to replace the sheet-metal decks. I should have pictures to post in a week or so.
I haven't seen the MTH steel truss bridge in person, but from what I can see in these pictures, the underneath deck detail is much nicer than Lionel's metal pan. Just looking for that sweet spot of price/availability vs detail and what looks right (for the D&RGW) to my eye. It really helps to see where that is for all of you.