RE: 1/4 scale schneider cup airfoil?
The 2412 shown above would not be a bad option. If you know that you have trouble keeping the weight in check with your building and want to get some help on that front then the Selig 8036 is a little thicker but has a good reputation for carrying fairly heavy wing loadings with good grace. On the other hand if you know you are a light builder and can guarnatee a wing loading on the lighter side of this size of model then you could use a more racy airfoil with a little less drag such as the Selig 8038.