I will admit it has been a while since I looked at Fords for anything other than a truck or truck like vehicles.
The new Mustang has much nicer interior materials, it no longer looks cheap, and it finally has an IRS, so the back doesn't have a hop, or as much of one.
Of course the price has risen to compensate, rather than focus on a $20k cheap pony car, a nicely equipped V8 Mustang will now run you about $40k, which is a bit nuts for what it is.
Still, for 435hp, that is pretty good, it'll do 0-60 in 4.5 seconds.
http://www.caranddriver.com/fo...
That being said, you want handling and curves, the GT is still tuned for the highway, being an American designed car for long, straight American highways.
The automatic version, it comes with all-season tires that won't impress you much, but if you change those out for summer performance tires, I think you'd be impressed.
At least when you consider the Mustang is $25K+ less expensive. :)
In terms of price, when you're talking BMW M3, you're approaching Corvette price range, and if you want to see impressive, check out the new Corvette Stingray. Lord that has been improved from prior models...