IMO......eventhough the 05+ is totally brand new, and performance enhancements were given...I believe it falls in the new "bling bling" category. The design was basically made to fit large wheels like 20's, much more elegant interior and a bigger/brawny stance. Look at some "similiar" cars......the magnum, charger, the 300..and so on. We've come to a point where people want Hollywood glam, and when it comes to cars more people want style and comfort with a bunch of sometimes useless gizmos. The DUB revolution has started. I can remember back in the late 80's and early 90's...17" wheels were large and racey looking compared to the 13/14/15" wheels most cars and trucks used to have, now 17's are almost standard on every new car which are considered small.
To me, the new mustangs went towards a styling category rather then performance, now they are no slouch on performance but I don't think that was #1 priority. Performance minds went to the Ford GT, unfortunately there aren't many and cost way more than any average person could ever afford. Even GT500's are near impossible to find at a fair price right now. I really feel the 03/04 Cobra's are your best bet. They are going for about half the price as a GT500 with low miles still. I want a GT500, but the Shelby name is going to keep those suckers pricey and hard to find.