In my area, the Tamiya and Kyosho F1 cars are the dominate ones. The 3Racing F113 is a good car (we have one guy running one and does very well with it), as well as the TOP Rebel (guy from Oklahoma comes down and run good with it). We have learned that with the Tamiya F104 cars, they work better our carpet track if you push the trac width out to 190mm. When at 180mm, the cars are a bit unstable and tend to catch and roll in corners if you are trying to carry a lot of speed. The Kyosho Plazma F1 and 3Racing F113 are closer to 200mm (which our track allows to run) and are very stable no matter how hard you push them.