I always love to read what people's favorite CD's are and why.
I use and love Bumgenius 3.0's. They are easy for me to wash and seem to fit perfectly. I also like good old fashioned prefolds with a Thirsties or Prorap Cover. I have used Snappy's and Thisties AIO and like them too.
For laundering we love Charlies soap...but in a pinch I have found that Arm and Hammer Washing Soda(not the detergent, this stuff is different and I can only find it in North Charlotte at Harris Teeter) mixed with a few squirts of Simple Green will do nicely. For stubborn stains/odors, vinegar and water seem to do great.