Steve -
The 76B, C, C+, C++ and D are all 11.7klbs MGTOW per Sikorsky's data and press releases.
Added power just gives better high hot and Cat-A performance.
The 76C++ will be fitted with an inlet barrier filter (imagine a huge K&N filter and you'll be right on) which will supposedly significantly lower the mean time between unscheduled removals.
Hoss