My vote is for the Apexi WS2. That's what I'm running on my B series. I've had it now for about 2.5 years or so, and is still going strong.
The way people are talking about it here, they make it sound like it barely makes any noise! It does, let me assure you, but it's not obnoxious. Especially since you're running a test pipe, you'll definately hear it. I've never been hassled by the cops, and lots of people have commented on how nice it sounds.
Try searching around on YouTube. You'll get a very rough idea of how each exhaust will sound with your motor. Won't be exactly how yours will sound, but will give an idea.
When I bought mine, it just so happened that the Apexi WS2 was the cheapest too out of the few I was looking at (Greddy, Tanabe, etc). Probably because the piping from the cat to the muffler isn't polished stainless steel (has a black powder coated type finish). I actually prefered this look, but to each their own.