Ok, today I had a Magnaflow muffler installed. I've got decent diameter pipe and nice bends from the factory. I lost weight, improved sound, and definently feel an increase in power( already did the K&N). I'm now opening up the floor to all those who want to discuss my idiocy, and my obvious shortcomings, mental, physical, phallic, monetary, or otherwise that led to my decision to go with this option rather than pay three times as much for a 'cat-back' system that offered no advantages other than a fancy name. I didn't even search for 'magnaflow' before I posted this! Please, discuss.
MV

p.s. I think I'm finally getting the hang of this posting thing....