Personally I would get the 7.5 FX because the components and wheels are better. Remember: fit first, then frame, then wheels, then components. Most of the money goes into the frame and wheels.

Disk brakes however are a great thing. You will not go back to anything else. Rain does not change how the brakes work. If you want flashy get the 7.5 FX Livestrong. That Black and yellow looks great.