It all depends on what conditions you plan to ride in. Is 10% or more of your riding going to be on dirt, loose gravel, in the rain, or city-technical (lots of stop and go)? If so, go for disc brakes. For the reasons mentioned above: Zero rim wear and better braking performance in poor conditions. Disc brakes offer consistent reliable braking in nearly all conditions, especially rain. You will lose a little performance in rain, but not nearly as bad as with most rim brakes. The weight difference is negligible, sure it may be as much as a full pound heavier for a disc brake setup, (rotor, bolts, caliper, pads, springs, adjustment plates... x2) but on a 30lb hybrid going to 31lb means going 9.93 miles instead of 10 miles with the same effort.