I don't know anything much about the current cams and their characteristics but having had an EVO Dyna on which we replaced the cam with a Crane 310, it moved the power band up a notch in RPM. That meant it was just getting ready to roll in the @ 3000-3500 RPM range, into it's very sweet spot. That equated to 80-85 MPH in top gear and it always wanted to be in the passing lane to go faster. Riding with my friends became a chore cruising @55- 60MPH.. in 3 or 4 gear. My advice is pick a cam that closely suits HIS riding style and speed, and is able to make power in a range that's useful to him. Match the air, exhaust system and tuning to get the most out of the combination otherwise it's not worth toying with. My experiment with using V&H Straightshots was a bust performance-wise but they looked great on that model bike. Either KhromeWerks or CycleShack slip-ons would have bought me much more for for much less cost. Check out nightrider.com too.
Point being.. choose the right cam for the job and match the components to get the result he'll be happy with.
Having learned that lesson, I was more careful with choosing on my next 2 bikes.
Just my take on it.