I finally got around to installing my magnaflow exhaust (bought from bigexhaust.com $140) - install cost ~ $130. Sound and look is much nicer than expected...very nice/deep sounds at low RPMs. Could not justify paying $600+ for other products out there which are not going to give me much of a performance gain.

<img src="http://pictureposter.audiworld.com/85359/magnaflow_14815_tips.t.jpg">

It would cost you 600+ for a full cat back from a manufac... for the money you spent you could probably have had a custom cat back put on.. I'd try just replacing your resonator with a magnaflow also, than you have a straight through design all the way..