Spammage: The gap from the 125 to the 100 isn't that great when you think about the 125 pw punching at 108 and the 100 cg with full topspin at about the same yardage 107-108.
With the 115CG instead of the 100 though you don't have issues with 107-108 into the wind. (The PW punch rolls and you have to know how. The 115 lands and stops.) That gap becomes 125-115-96 (very chokeable punch) and the 80.
The 115CG is great for using with no spin at all. The trajectory is high and the rollout is small. The punch is very accurate from 96 down to the CG80 and when you're punching into high winds you get more control.
Dylyn's point about that 3w punch is an excellent one. Punching with top spin out of 40-50 gets some serious roll. Just make sure you aim it right because it's on the ground real fast, like in very little carry.