The edge is a good unit, but the smarty's are one of the better ones.
As for the turbo, I can't help you there, i'll be upgrading mine soon to.

 

ATS puts out a hell of a turbo. Both Edge and Smarty (jr) are really good tuners also. A Cummins has the potential to make gobs of hp and a huge butt-load of tq. So much so that you would likely start breaking things. Keep it practical, especially if its your daily driver, only transportation, or if ya make a living with it. Just keep in mind, to keep your EGT's in check. Too high, and your pistons will pay the ultimate price. And, billowing black smoke out your exhaust is unburned fuel being wasted. (I cant believe I started a sentence with a conjunction)