CBoats.net - C1 B1!
has alot of discussions, plenty of info. What lenght are you using, how tall are you, how long are your arms? lots of things can affect what lenght fits. Playboating only? shallow creeks?
I'm 5'9" and like 56"- 60" paddles for my open boats and 54"-56" for my decked boats depending on what I'm paddling