I used to buy cheaper exhaust system, thinking it would save me money....NO........in the long run the cheaper system is what it is "cheap", and you will be buying another exhaust system because the cheaper one already rusted out or sometime.
I like the sound of Flowmaster mufflers over Magnaflow, but you buy what ever you like...........but don't buy the cheaper one.
Check out what what sounds YOU like.
www.muffler.com