Other than Corsa,B&M, and Borla what are my other choices?
There's also Snake-Oyl. You can go to their website. They have both cat-back, or headers/exhaust (a.k.a.- full exhaust). They're is also Belanger. I recommend you go to a VCA/Viper event and ask people what kind of exhaust they have. Different exhaust sounds best to different people. IMO-
Snake-Oyl's cat-back is more muscle carish. It has the sound a stock Viper should come with. Great sound, volume, idle, rumble, burble. I have spent a lot of time with this system, as it was on the Viper I was most familiar with.
Corsa's 3" has the same sound, is a little louder than S-Oyl's, not as much burble. I've ridden in an '01 GTS with this system.
Belanger is louder than Corsa's. I've only heard a Viper with Belandger full exhaust on a dyno. You could hear the exhaust all the way through the rev range (you can't with S-O, Corsa, Borla).
B&B's is more of a NASCAR idle, louder than Belanger. I heard this system at idle at Viper Days at VA Internat'l Raceway.
For my terms and ears, Snake-Oyl and Corsa are mild sounding, and Belanger and B&B are wild sounding. You just have to determine which one you want. These systems that I discussed are for Gen II Vipers only.