For road riding, discs are overkill. Heck, discs are overkill for about 95% of the people and the riding they do! But, I've got some, and will never go back! Why? For that 5% of the time when you DO need them, it's sweet!
L8R
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"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming, "WOW, What a Ride!" - unknown
"Your Bike Sucks" - Sky Yaeger