New Exhaust with DPF Delete??

Hi guys.....I am a newbie. I am officially a converted dodge man (from GM). I have a 2011 6.7L HO. I am about to go ahead and do the H&S programmer and a DPF delete. Not sure about doing the EGR deletes? Input on the EGR would be great.

I am wondering if I need to and / or what the benefits are of installing a new exhaust when I do the DPF delete?

Thanks