I want to start customizing my bike, I think the best way to start is exhaust, mainly for looks and sounds rather then performance. Is this the best way to start? I have been doing some research and want a quality exhaust for about $300. So far my top pick are the Sarachu pipes they seem like quality pipes and I hear they sound good. What do I lose by upgrading my exhaust, I hear things like flat spots and performance decrease, is that true? Also can someone explain the poping aftermarket exhaust has in more detail? Mainly I want something that sounds nice.