So my uniform of the day while running med classes is either a plain black polo w/ no logos, or a sand/khaki/you get the idea color combat shirt with reversed IR flag and MED patch.
I've been running the black polo with no issues, but have been looking into the combat shirt lately. I'm familiar with the concept, having worn FROG gear, but we're not allowed to run anything with camouflage patterns, so all my extra shit is useless.
Aside from the Crye and Tru-Spec shirts, I haven't seen any. I'd prefer the zip up design that the Crye shirt has, but the price is a bit painful for a shirt that would get worn only a few times a month.