what to expect from full system and Power Commander

I was just wondering what kind of HP and torque one can expect from a Gen 5 with a good aftermarket full exhaust and Power Commander?
And I am talking about dyno tuning the PC....I'm not one that subscribes to the notion that you can just drop some extraneous map in a bike and it runs as good as it could. I never did that with my race bikes and I won't do it with this one if I decide to go this route.
So what are some numbers you can achieve on these engines? It's dependent upon the exhaust you put on, I know, but I'm talking general numbers here.

 

My guesstimate would be 15HP max. But the real bonus is better sound and smoother power delivery.