Those are all quality programs. Personally, I'd rank Pitt very highly (I ranked it right behind my current program), but that's just my own preferences.
Regarding ortho, even if you don't get a great ortho experience (fracture complex dislocation reductions left to them), you'l be ortho savvy within a month or two of graduating. I know this from attendings who've worked in both environments. I'd caution using that as a primary deciding factor. My own program has this problem (which I inform applicants of), buti put in a little extra time at the community facility, and feel completely comfortable superceding ortho on emergent fracture reductions a week later when i had to reduce a horrible fracture- dislocation of an (twisted >100 degrees with tenting). Some procedures you want access to a lot of them to feel comfortable (intubations, central lines), others you'll find yourself completely fine with after a few times (chest tubes)
Things I would think about more strongly:
Location - do you want rural, suburban, or urban? do you care? and can you live in an area you're comfortable with in terms of area of the country? how far do you want to be from your family or is this not a consideration? are you going to be married and have kids? where do you want them to grow up. Where do you want to work in teh country after residency or are you not sure?
Community facility - are you interested in community medicine, is there a separate community ED you work at?
Peds - is there a separate peds ED with peds EM-boarded people? is it longitudinal, i.e. are you seeing kids throughout the year, or is it a single block during your entire residency? do you want to get semi-comfortable with kids?
Moonlighting - do you want to do moonlighting or not? does the program allow it?
Ultrasound - make sure you have some way of getting facile with this. I don't even know if this is an issue though as most residencies train you in this.
Floor - do you care about floor months? want to avoid them? want to include them?
