Going darkside opens a HUGE can of worms with riders. The consensus is close to 50/50 split.
I like the idea of going darkside purely for the tire longevity. However, car tires are not designed to handle the angles motorcycles can achieve. Care tires are fine as long as the bike is going in a straight line; but, once it starts taking a corner, the amount of tread touching the pavement reduces dramatically.
I'd spend some time reading about darksiders and weighing in on the pro's and con's of each side of the topic.