Everything I've seen from Marquez Design is first class. The fit, finish, and style are great. Damn near every first gen Camaro I saw at SEMA had them. Even the Baldwin Motion and the Foose cars. I'd recommend them. You can see the stuff at
www.marquezdesign.com.
For LED tail lights, try American Auto Wire. They have a video on their home page on how they work and look. I want a set like that for my '77 Camaro. For LED's on every other part, many of aftermarket places for imports around me have them, and I use them. Just a little touch I like adding to my cars.
edit: I forgot to add the AAW website.
www.americanautowire.com