02 f250 exhaust

Hey this is my first post and was wondering: I just bought a slightly used 02 f250. i went to my trusted exhaust shop and was told that they didnt have much experiance with the newer 250's. i was wondering if you guys could share some wisdom in the ways of a new exhaust system. i had a 91 bronc and had straights to a single flowmaster and liked the sound. i also had a 96 f150 and had straights put on it and loved it, both were 5.0's. the 250 has the 5.4 and by the size of the cat looks like it would quiet down pretty much everything out there. i want a nice rumble straight pipe like but heard the straight pipe's on the v8 250's sounded odd. if anyone could help me out that;d be cool