Were I to do your exhaust I would use 2-1/4" mandrel pipe, no X crossover and the transverse case Dynomax.
Why smaller pipe? Don't really need 2-1/2", and using RA3 manifold with 2-1/2" downpipes is a PITA. Fitment is far easier with smaller pipes along with ground clearance, and when I went from 2-1/4" to 2-1/2" on my Lemans with the same type of mufflers it got MUCH louder. To me, all a loud exhaust does is call attention to hoonish action to the guys with blue lights.
I would maybe even stick with the logs - on lower HP apps they do not lose much power and are considerably lighter and cheaper.