Like you I hate loud bikes.
After 45 years of racing off road, (nothin' worse than coming up behind a 450 with the freakin loud silencers, getting stuck behind them and having to put up with the freakin noise), (I race a KTM 200 2 smoker). After years of abuse, my ears hurt when a certain tone hits them, and for some reason bike exhaust seems to hurt them.
On my KLR I wanted to get rid of the "Chrip can" exhaust, but didnt want it to sound like a quad with a empty muffler can.
I dropped on the Lexx muffler, was cheap and really not much louder in stock form with the spark arrestor in place.
I had opened the air box up and had to rejet the bike, I installed the KLX needle also.
I wear ear plugs when I ride, but my wife says it's not much louder than before. I like the over all sound, not much louder than my Hsarley with stock mufflers.
Just an old guys thoughts and ideas. These should be taken with a can er 2 of brew!