Yes those cars are faster and slightly more expensive, but many Mustang fans would rather spend extra and get a 375HP car for $30,000 vs. a 300HP car for $26,000. Sure you can mod, but the vast majority of owners don't mod and don't want to risk voiding the warranty. Plus modding lowers your resale value.
I'll try to get links, (I think I read the dyno stuff from Blueovalnews but I'll have to double check) they were pre-production cars. the vid of the 14.2 auto mustang is all over the web.
No, because the V6 is cheaper, cost less to reapir (less parts), and probably gets in less accedents. exp: 310hp Camaro is Cheaper to insure than a 260hp Mustang or 170hp Integra.
Charger will be shown this winter and will be in showrooms by April 2005