Robert: You could go either way. The district feels smaller than it is (due to its shape) most people size up when they ride it. People who normally ride a 134-135cm board will jump on the 137 and people who ride a 139-140 board will jump on the 142. I'd think you'd be much much happier on the 142.
Kyle: If you want molded fins because you ride cable/rails go with the bolt on slider fins and the sintered base. It'll last longer with the slider abuse.