I like my Beowulf Warrior
Had it on my 600 and now have it on the thou - slightly quieter on the thou I think but the lower rev range has certainly been spiced up a bit with more growl compared to the Fuel can that was on before
It depends on how you like your exhausts; some just want that little extra without the drone on the motorway. Personally I will happily tolerate any drone for a lovely sounding exhaust the rest of the time. I also don't notice this issue much as my helmet is very loud and I get a lot of wind noise