I don't really care about the sound of the mufflers (been a beemer for years

) but I know that if I'd get extra money, I wouldn't use it in expensive mufflers but in these french shock absorbers :
http://www.emc-suspensions.fr/amortisseur-moto-EMC-Honda-1800-F6C-Valkyrie-14---15_3_1483.htm640/850 €, more or less the price in US$
I've never had these (Öhlins is my first choice) but people here are quite satisfied with these EMC