I like the look and suspension changes, but no, I won't trade for one.
Here's something to think about: The modular engine is finally evolving into a powerplant worthy of being in a Mustang. Face it, the '96-'98 GT's were saddled with the SOHC Crown Vic motor and really wasn't ready to push a pony car effectively. Ford should've stuck with the 5.0L until the 4.6L was truly ready for the Mustang, perhaps that would've been 1999? when the body was restyled. The power output of the '99+ is better, but as HP hungry as Mustang buyer are they still wanted more. Now with the '05, you may be seeing the beginning of the end, as far a modifiying goes. With yet another 'new' head design, variable valve timing, etc, as stated before, this will require everyone to start over. I see a vision of the ill-fated LS1 Camaro, fast out of the box, but a real hassle to modify and very expensive aftermarket.
Becareful, what you ask for you may just get it.