996-
I've run the Stillen dual and the APS 3" and currently have the Greddy EVO TT. I loved the Stillen, but it was too restrictive for the kind of power I wanted. The APS really flowed well, but it was a little obnoxious for my cul-de-sac and the Greddy is juuuuust right. I feel like Goldilocks:-)
One of my buddies has the Borla, but I didn't feel it was as well-made as the Stillen and it has more pipe sections.
I've been told the roadster is somewhat quieter than the coupe because of the top storage area (as opposed to the cargo area in the coupe).
Seems counter-intuitive, but it does give you a big dead-air space......
Good luck,
Bruce

 

+1 for the Nismo.

I listened to a bunch of clips before I picked the Nismo, and I personally felt that most were way too loud when the top is down. Just my $.02

 

I recommend the Invidia G200. Just barely raspy in a certain area of the rpms. Not even close to the other Z's that Ive heard with it. I haven't put the cross-over pipe on yet. I can feel a little loss in torque, but nothing drastic. It sounds pretty viscious from 4,000rpm up. Im pretty happy with it.

 

I just put a Nismo on my new 2006 and a Popcharger. It is a totally new car. It sounds GREAT!!!!

 

Popcharger in the kitchen, Nismo and MREV2 @ 5/16 on the way!!
Cant wait!

 

where do you find these sound clips of the different exhausts I to am wondering what exhaust i want for my z roadster.

 

Here is a thread on it: https://my350z.com/forum/intake-exhaust/105031-exhaust-sound-clips-needed.html
Also some sound clips here: http://www.everything350z.com/exhaust.html

 

Im liking the Powerhouse- amuse R1 titan, mines Vx pro titan, and the Gandor vertex titan that site was alot of help thanks. Just need to narrow it down to one now haha

 

Invidia G200 cat-back. The most underrated out there. 6 to 8 hp increase with a nice deep throaty sound in mid to high rev