I've got an '05 Mustang GT with a ProCharger, Borla exhaust with an offroad x-pipe, 3.90 gears, Eibach springs, Tokico D-Spec adjustable shocks, AP Racing brakes, and a couple of other mods. I love it! Very comfortable to drive, tons of power, and it looks pretty decent too.
It's tough to compare it to a classic muscle car though because it just doesn't feel, smell, or drive quite like one. I don't mind though since, I drive mine almost daily.
Here's a pic or two:
