Here's my Apex-i WS2 cat-back.
http://www.youtube.com/watch?v=5jZlwZym7js

In that video, I also have a header, intake, and a bunch of other mods. Also, +1 for you not wanting to sound like a swarm of angry bees. haha

 

Was it cold out or does your car just smoke bad?

 

^^ It was a cold morning in March. I didn't have the car warmed up before taking that video because you can really hear the cam lope at idle when the engine is cold.

 

I've got the magnaflow and love it. I couldn't comment on the apexi I don't know about it, but another plus to geting a header is if you plan on doing other mods in the future it will help with better flow and may give you a tad better sound