I think sanke's work great. Remove the dip tube like this:
http://www.physics.arizona.edu/~workman/homebrew/Sanke.html
Clean it like you would a carboy...sanitize w/ starsan...fill w/ beer and install the dip tube. Place in kegerator and purge o2. Carb and enjoy!
Edit: Removing and reinstalling the dip tube can be a bit tricky.
I struggled w/ the installation of the spiral sanke rings. The method that I've finally become skilled at works well for me and I will share. All that is needed is a small pair of channel lock pliers (say 6"0). A regular pair of pliers would probably also work but the offset working angle of the channel locks helps.
All you do is get the spiral ring started by hand which is usually close to 1 revolution. The point at which it becomes difficult is when the spiral ring is doubled in the retaining groove. Position about half of the remaining free end of the ring inside the neck of the keg adjacent to the retaining groove.
Begin forcing the ring in the groove w/ the pliers by squeezing between the snap ring and the outside neck of the keg, well behind the unseated portion . Slowly proceed around the keg neck w/ the pliers and the ring will spiral into the groove. As the second revolution of the ring is seating, position the remaining free end adjacent to the retaining groove.
Only move the pliers 1/8 - 1/4" w/ every compression. If the ring seats in the groove, great, move forward and squeeze again. If the ring is stubborn, back up and make sure the preceeding portion is full seated!
This is difficult to put into words but w/ a little practice it's a 30 second job.
I actually have grown to like the spiral rings in that they are compressing the large o-ring upon installation, and this I believe is why they can be a PIA to install. Not sure a regular snap ring will compress the o-ring seal as well.
Good luck, it's tricky at first but will become easy.
Mike