Hey Dude - thanks for your service!
For me, if there’s a higher than average likelihood that I’m going to need to use my knife as a weapon, (as you indicated might be your situation), especially against people wearing gear, I want a knife that’s a weapon FIRST.
To me that means two things primarily: A very substantial guard and a penetrating point. Durability is certainly a plus but wouldn’t be my first consideration unless I’m likely to be walking with a very small group.
Of the models you listed, I’d go with the SRK as it probably has the most substantial guard of the lot, but none of them really have adequate guards in my opinion.
This is the knife I’d take into urban combat (something larger in forest/jungle):
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And this is what I’d purchase in your price range if I was in the market - Kabar Modified Tanto:
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