I have a "04" Sportster 883XL that I'm going to change the exhaust on. Looking at Screamin Eagle II Slip-Ons or the Porker Swichblades. I don't necessarily want it extremely loud but to sound and perform good. I have a FatBoy with a Thunder Header and love it but don't need quite that on the Sportster (cost is a factor). Any suggestions? Thanks!