The concensus is that just swapping out the mufflers doesnt make for a very good sound on this platform. The only ones I've heard that sounded decent were valvetronic mufflers, I think I saw a clip on youtube one time and thought they sounded decent but it was a custom job.
What sounds good is subjective. What is obnoxiously loud could be music to other's ears.
Trying to judge sound by video or sound clip is even worse. I've tried to record sound of my custom exhaust and, regardless of how I tried, none of them sounded anything like hearing it live in person. This is even with calibrated audiophile-grade mics.