I'm looking at a 450 MXC and 525 EXC. The 525 is almost 1000 dollars more and am not sure the extra 60cc is really worth it. My bigger question is the gearing in the MXC... I know it has a close ratio trans but am concerned that it will not work well for long rides in Mexico. Does anyone know the differnce in the gear ratios between the two bikes. The up side to the MXC is the larger tank for distance riding... I need some advise.