Gotta love all the excuses, its not pretty enough, its too heavy, I dont need it.
Translation------I ride only when its sunny and nice and part time at that, and I spend more time ogling over my bike than riding it
difference in weight is about 1 pound- 1.5lbs if that
stock normal rims are just fine,its just a hub and fork change, only need a disc up front where its gonna do some good anyway
Now if you ride like the typical roadie and only ride a couple thousand miles/yr in nice weather then NO, you wont need a disc,it wont help you.Ride in the rain,snow,ice, and salt and you'll fall in love with it and wonder how you got by without it.Its an extra pound or two, sheesh, in real world conditions that equates to almost nothing unless your racing AND in great physical shape to begin with.