Old Rotor Head

Sound and weight. I over the last 9 years I've gone from the A&A mod to Borlas and to the Ti's. It's my daily driver and the Ti's work best for me sound wise.

C5XTASY

They are a quiet exhaust, and do sound a bit different than a stocker, so, if that's what you're after, go for it. However, if you are after an aggressive sound, look elsewhere, IMHO. Best thing you can do is listen to a bunch of different catbacks, in person, and with and without headers, in case you decide to go that route in the future, then make your choice.
Ed

B-Vette

Here is one big benefit - you won't have to look at something as ugly as this everyday

Vettman 1

Mine 2000's looked just like the ones pictured above. I found these for $4o bucks on Craigslist A bit louder under wot, much lighter, and nicer looking.

Independent1

As others have said, the Ti exhaust is lighter, less restrictive, and sounds better.