I did the research you are about to do and recommend that you continue until you are satisfied.

I chose the B & B Catback, dual in single out, single side. For the cost and the quality, I could not have chosen better.

I was even able to install it myself in my driveway without welding and it is solid. Do a search on this site. QShip's comments helped me to decide.
If I had to chose today, the Nismo duals (single side) would be a serious contender.

Search this site under Papa D, he has provided some interesting comments about the NISMO catback.
I purchased a Borla catback in the past for another vehicle.

I had to pay to have it installed and later paid to have it removed and sent it back to Borla. There was too much noise from the rattles and my refusal to weld versus the bolt up option. I expected more as far as the quality for the price.
If you've gone this far, you'll probably consider getting a performance cold air intake and headers.

See Stillen.com or Kylem on this site for more specifics. I suggest looking at the NISMO intake and Stillen Long Tubes. Stillen is coming out with a B-pipe rather than a need for Cat Simulators (electronic bypass to simulate Cats).

As yet another exhaust option, I understand and know that Stillen's catback exhausts perform well. These days Stillen.com has monthly specials and free shipping is available for the most part.
