Dos Reales is, hands-down, the best Mexican restaurant in the Champaign-Urbana area. The service is UNBELIEVABLY fast, they're totally willing to customize your dishes, and their white queso sauce is to die for.
Ask for a bowl of white queso with your tortilla chips, you won't regret it! Incredible salsa as well, tastes like it's homemade. And won't break your wallet at all!