The MH-47E is used by the US Army for long range helicopter insertions. It is mainly used for the Army Special Forces but i don't see how that should stop it from coming to PR, seeing as it is used by the Army.
Interesting things about the MH-47E
- It is air refuel-able (not that this is relevant in PR... yet)
- Features Forward Looking Infrared (FLIR).
- Multi-mode Radar.
- Pretty much everything the HC2 has.
This would be a good equivalent to the HC2 for the US Army in PR.
You can find extra info HERE
Here are some images:





