I've used:
Endurox - nearly undrinkable taste regardless of flavor
Cytomax whatever their recovery drink is - disgusting taste regardless of flavor
ultragen by 1st endurance - cappucino flavor is very tasty, but is very expensive and hard to find
milk - tastes good, is significantly less expensive, and sold everywhere.
I've noticed no difference in recovery, and now just drink milk or chocolate milk as a recovery drink along with a pb&j on wheat.