I have Magnaflows on mine and love them. They are straight though design and have a really nice tone. My buddy runs them on his 93 GT also (the sound clip under X pipe on Mustangexhaust.com) and the X changes the sound a lot! Very exotic sounding.
Here's a clip of mine (BBK 1 3/4" longtubes, 2.5" H pipe, 2.5" Magnaflows):
http://members.shaw.ca/jonathan.kudryk/jonnyk2.mp3