Drain service recommendation?

It's that time again... my shower filled up with funky looking water. This has happened a few times since we've lived in this house and each time we had a friend of a friend that worked for Roto Rooter come out and and run a snake through the drain, off the clock. Unfortunately our guy quit (maybe it was dealing with our people's waste water that turned him off?) and now we're stuck paying full price.

Anybody have any suggestions/experiences as far as pricing and customer service?