I think I want to go with Spintech mufflers on my exhaust redo on my '94 chevy 350. The current set up is true 2.5" dual....i'm going to go with 2.5" dual again and an x-pipe. Last time we had 2 40 series flows going out back, but this time we are going to use dumps. We want it to be louder than the flowmaster, but we have to drive this on 700 mile road trips every now and again. which muffler do you think would be best for our combination?