I did part of mine in IAH. I'm partial to Denver, but one big advantage in IAH: it is the only sim in the system that is actually configured like a 756!! The TK sims are double-duty as 76T and 756. They swap a few boxes between sessions from one type to the other, but many things are "not quite right." (Audio panel, radar panel, transponder, some test switches, maybe some lighting switches).

Ironically, the IAH sim is the one they plan to get rid of.....I hope they don't.