2002 Ford Mustang GT Deluxe 2dr Coupe (4.6L 8cyl 5M)
Performance is not as fast as the Camaro/Firebird V8's; but with a little tweaking you can hit that 300hp line and be right up there with them.
As far as comfort; well the 5-speed stick is quite a reach to get to; the most comfortable place for it would be where the first cup-holder is. Same with radio controls; they are very hard to reach. The driver/passenger seat also do not recline very far.
Mach 460-- stereo has some oomph... though I would expect more from the subs.
4.6L V8 is powerful and I think has the best sounding exhaust of the muscle-car families out there. Especially with Flowmaster; gives the Mustang the sound that was meant for it.
Shifter location; radio controls on steering wheel; Independant rear suspension option on GT's; lose the fake hood scoop and make something functional like the GM's.