Pretty much a bunch of you need to stop and think for a sec...
1. You have not driven either most likely for more than a day or 2 so you really have not got a feel for either car.
2. A mustang does not take 6 seconds to get to 60 unless you throw a second burnout in there.
3. I got my mustang gt for 6k with just over 110000 miles on it and it runs perfectly and looks great the best price your gunna get for a 350z is like 15k 13 if your lucky, so i have at least 6k more to boost my car.
In short the stang is way better than you give credit. Its much cheaper, and with the extra $$ you can drop a saleen supercharger in it and be pushin upwards of 400 ponies. Sure stock maybe a 350z may be able to beat my stang, but you had to spend twice to 3 times what i paid to barely beat me.