I'm considering putting a disc on the front and leave the v-brake on the rear of my commute bike. I hate the noise my rim brakes create when I don't keep the rims clean. I had them adjusted perfectly...no noise and stopped great. That lasted for about a week. Now the squeel again.

I want to run panniers and a rack, and dont want to deal with the rack if I have to fix a rear flat. Plus the rtear brakes don't do a whole lot anyway.