According to the WhiteBrothers catalog, the E-series S-bend silencer is more for a better low end and the ProMeg is for better mid to top end. So my question is this: Do you think it would be better to get the low end pipe to compensate for the lack of low end response? ..or.. Would it be better to accentuate the qualities the 426 already has with the mid and top end pipe? We know that the 426 screams in the top end, so wouldnt that just make it screem more?? What are your thoughts on the e-series pipes. I like how they are tunable with the discs, and them not being ridiculously long is a plus, are they good? I need to have a spark arrestor and though it would just be better to go with the whole pipe than spend $150 for just an end cap. My price range is under $300. What would you prefer between the E-series Promeg, S-bend... or .. FMF PowerCoreIV with SA. - And Why?