If your talking about the offroad cars/sand cars, I don't think they can be beat. First class stuff all the way.
Geiser Bros is good too.
Im partial to Kreger Fab as well.
What the f*ck Guss.
Coleman Motorsports 1623
Racer Engineering along with Kreger Fab are most definitely the top offroad buggy builders.
Alumi Craft can be thrown in there too.
overpriced! but one of the nicest cars around
look into sand cars unlimited kregar a few others if your looking to buy used you can find some really nice stuff for decent prices right now i dont think i could spend 150K to 250K on a racer.. Exspecially when i can get something that will handle nice and be fast for 75K. Only reason to buy a racer is to say hey everyone look i have more money then everyone else