Two brothers Juice box?

I've got an '07 650R. So far the only performance mod is a Jardine GP1 race can with stock header. I'm thinking about modding the airbox and getting some sort of fuel management like the juice box or power commander. Will this be worth is and does anyone have experience with this? I have never used any sort of fuel management in the past. I know that my bike is running rich but I don't know how badly.