I like my PIAA's. I guess it depends on what you're looking for though. I dont think there's any comparrison to the stock fog lenses, either with a GMC or Chevy, but the patterns are pretty decent.
I think when I get my IB Bumper, I'm gonna get creative and throw the biggest size of these I can in the Lamp Spots. You can get them in Low Beam / Fog / High Beam Patterns.