I love my Mach, but I also like the old cobra style too. First off is what's your budget? The cobras are cheaper and less hard to find. The Mach has 3.55 gears and more torque plus it has the coil on plug set up. In the end its all up to you.
I am also a fan of the sn95 body style!! But I am also a huge fan of performance and the Mach being newer and with the 3.55 will probably be your best bet for performance. But the sn95 will look sexy!!