I'll weigh in on this one... h:

I have the Apex'i World Sport II cat-back on my 97 DC4 and without a doubt, it is a fantastic product. Fitment was a breeze and it's totally devoid of flatulent resonance.

Since you're not in the snow belt, the coated mild-steel tubing will be fine for your climate. If rust-through is a concern, look at the RS*R ExMag. It's of similar design as the WSII, but made solely of stainless steel.