There is a reason the Mustang has remained in production while the Camaro/Firebird went the way of the dodo.. Not the the Camaro concept is a real beauty either. GM's greatest weakness, now that they seem to be getting QC under control, has been their styling. If only GM had J. Mays, they might be able to resurrect their muscle car heritage.
BTW, the "generic" Mustang as you call it is the new 650+ HP Super Snake, supposedly a Z06 killer with better lines.
My favorite car was my '73 Firebird. Lean and powerful with gorgeous lines. Were never the same after that generation
GM, please bring this back!