3" or 2 1/2"??

I am trying to decide on my exhaust system.
Engine is a fresh 340 stroker (422) makes 470hp and 500tq.
I am thinking of going with the pypes system with x pipe and race pro mufflers or for a bit less cash I am considering the summit 3" dual system with summit dul chamber mufflers with no x pipe. Will the 3" be better or worse? My thinking is because of the larger siZe I will not need the crossover? (Plus the price is nice!)w
Any thoughts?