I have a new 2010 R/T challenger and after selling my old car I deciding on two different "upgrades" to my exhaust. The car won't be doing any racing for a while but I do like the fact that the flowmaster will improve performance. Right now its all about the sound. Glasspacks offer an interesting sound but the flowmaster offers a beastier sound but for more buck. My question is that @ this stage of the game which is the better choice? One offers a louder sound but has a higher drone (or so I've heard), the other is a little cheaper for a better then stock sound. Does anyone have any experience with the flowmaster? How much of a difference is the performance boost? Not looking into the $1,000+ systems now because that's out of my range but does anyone having a better experience with another system? Thanks again!