Whatever the decision, we need some coherency across the fleet, ie: CH47/Blackhawk CH47/Merlin not CH47/Puma/Merlin/Jungly.
This would save money in infrastructure, eng processes etc.
My personal favoure option (utopia time) would be CH47/Blackhawk for SH, Seahawk for the jungly guys.
The Seahawk is pretty capable, and the eng similarities between Black/Seahawk would eradicate much of the doubling of Eng assets/sims.