Marc, http://www.modelingmadness.com/ is a good site for reviews, and they include cars. Wish they would upgrade their website, looks like 1995, but the reviews are good.
The Lotus 25 is my favorite Grand Prix cars and Jim Clark my favorite driver. I have one in my stash. It was known as Formula 1 back then, but just about everyone called it Grand Prix, a more elegant name IMHO!
Here's a good website to get your creative juices flowing.