I would not cheap out on an exhaust if you want it to sound good. Any higher end exhaust will sound good, its just about tone and how it sounds that you get to decide. Personally I like FlowMaster or Borla, stainless steel is always the best option so it will not rust. Also you do not need headers for it to sound good, though it might sound a little better and louder with headers if you wanted to install them.