Cable disc work pretty good and can be found cheap. The rotor/calipers I am using are $11 each but remember you have to have disc capable hubs also.X-seler: thank you I will remember that and 2Door: Yes I am looking into getting disc brakes on my first build and on the second I am thinking about, cable brakes just dont cut it!! Thanks guys was kinda wondering the difference from cable to coaster brakes! Definitely looking into buying some disc brakes!!
+1Ross, the disc compatable hubs have a 6 bolt pattern on one end and it isnt likely that yours will be disc hubs, they rarley come on a bike that doesnt already have disc. And LR Jerry is right, properly adjusted V-brakes(Rim brakes) work great. As far as noise, rim brake pads need to have a little toe in adjustment and they wont squeel.