+1 for the Pavelow model, either the H or J variant (if they could even swing it with how some of the penetrator systems are most likely classified). It's basically the American version of the Mi-8, except way better, and way cooler. The 53 would definitely make troop transport, especially behind enemy lines, much more exciting than the UH-1 (not saying I don't love the UH-1, but if they're going to have the OH-58 and AH-64, why not allow troop transport to be up-to-date as well?).