I can't tell you because its up to you. The dealer one is a borola, read the reviews.
I am not too familiar with the one being sold around here.
I used a magnaflow muffler and cut, bent, and welded it up using the stock tips. Only cost about $100 but I paid no labor.
If you don't have, or know someone with the tools and know how you could take it to a local muffler or street rod shop.
The problem with online discussions is everyone has a different definition of loud, good, and other such terms.
Good luck with your decision. If you have any specific questions, I'll try to help you out.