I would recommend 205/75/R14. The 205 is a little wider and the 75 is a little taller. That fills the wheel wells better IMHO. I wouldn't worry too much about the speedo, especially with a 240.
As for the brand of tire, and this is just a product of my anality, but I go alot with how the tire looks. I know that might be an odd way to pick, but to me it makes a difference. Who wants a good tire that looks bad.
