Contour Enthusiasts Group Archives Forums Modifications Duratec Performance Exhaust question

I was thinking about putting an exhaust on my SVT. I am going to cut out the resonator and put in a round 20" magnaflow and then cut the rear mufflers off and put tips on. I have found a website where i can get all of it shipped to me for $111. My main question is do you think it will be too loud w/ a straight through round muffler or should i look into getting an offset 20" muffler??? thnx