I really like the spoiler on the Woodward GTO. IMO it's perfect, but no one makes a 3-piece like it.
So far the only spoiler I've seen even close to the same design is the
AP spoiler. But it's a single-piece which wraps around the rear fenders. It's less rounded and juts out a little too far to the rear for my taste...not what I want. Plus I've heard nothing but horror stories about dealing with AP. Once it gets warmer here and I have the time to mess with the car I'll probably go spoilerless (with plugs) for a while just to see if I like it. I do like the spoilerless look...very clean.