If you have to run cats get the high flow jobs from summit racing. That`ll set you back about $220. If you don`t have to run cat`s I wouldn`t.
Go to YouTube and type in exhaust sound clips. You`ll get to pick from thousands running Turbo mufflers, Glass packs, flow masters, borlas, Hookers, Edelbrocks, flow tech, Gibsons, Heart throbs, straight pipes, etc.
There are alot of chevy truck sound clips on there as well.