The frame of this bike has the capacity for V-brakes and disc brakes. There are some problems with the rear V-brake and I am considering installing a disc brake instead (just for elevated coolness). The bike is one year old. The only part, that was exchanged is the chain - one month ago. The bike is a commuter/touring/cross-country style ridden. The hubs of the wheels do not have holes for bolts, that should hold a disc.
What are the main things to consider when upgrading to a rear disc brake? What parts should I buy? I am considering brake + whole assembled rear wheel == hub+spokes+rim.