FE - I'll let you know how it turns out on my 2002 RT-10. I just received all the parts for a Corsa 3" cat-back with hi-flow cats. It took a lot of searches and a lot of discussion to actually make a decision. It's a tough one........
Search and you'll find a few sound files and a TON of ideas and advice.
From my long hours of research I boiled it down to the following for myself:
The only thing that really scared me was making sure it was legal, and didn't throw any codes so I could pass emissions. I wanted to do the work myself (needed to be bolt on). Other than that, it seems to be sound preference (loud, louder, and loudest) and the look of the tips.......
And of course - cost.........
I paid attention to the discussions on the sound - not only outside the car, but inside as well (resonance) - since I plan on driving mine a lot on the street and unlike many other Viper purists - I like to hear the radio.....
All the best on your choice.....