Stick em on the C17s. The yanks don't have an intermediate size transport aircraft to lug all their Pirahnas etc around in they just go on a boat or a C17.
Personally I reckon we could do with a bunch of C17s, the remaining C130s and a fleet of C27Js. The C17s just take the stuff directly to where it needs to go or spoke it out on a couple of C130s, whilst the C27J would cover 95% of all the in-theatre TacAT requirements.