I had the Vance and Hines Monster Ovals and they are loud for extended periods of riding, great for running around town errands etc. sold
I have a set of BUB's ( cone tip ) and a set of Krome Werks 3 1/2 slant back with the touring baffle "touring lite". They both sound about the same, deep tone and tolerable on long rides ( 500-600 miles for a couple of days ).
I also have a set of Peacemakers turn downs or turn outs ( 3 screws to take out to turn ). These are my favorite for around the house,errands parades etc. but to loud for long runs. on the bike now
I have a set of stock Harley slant back with the 2 front baffles removed that I run most of the time louder than stock but not annoying on long trips ( 500-600 miles a day stuff for several days ).
It's like everything else different people like different kinds of loud. IMHO