Yes I know "it's personal preference," What is your favorite slip on exhaust for a deep, loud growl type exhaust? One that doesn't sound like "loud trash," if that makes sense.
Rhetorical question; who cares what anyone else thinks sounds good? I ask, because you’ll get almost as many different choices as you do replies. So far you got 5 replies with 6 choices and mine (as I write this) a 7th choice.
2) Arlen Ness Magnaflows
3) American Custom Bomber
4) Fuel Moto Jackpots
5) Cobra Neighborhaters
6) Cobra Neighborhaters
7) RC Components RCX
Your best bet is to go to a “bike night”, a biker friendly place, or better yet, a bike rally and listen with your own ears. Since pipes will sound different on a stock headpipe, than on a header or true dual system, or with a more aggressive cam and head work, that’s another factor to consider, so ask questions since it’s not just the pipe that makes the bike “sound good”.
RC Components RCX turns my head. Don’t see them on many bikes, Rineharts/V&H/CFR/Bassani seem to have the lions share, but when I hear pipes that sound good to my ear and I turn and look, they’re RCX, but again, who cares what I think; it’s what YOU think that matters. Good luck.