Some that are really popular on the market is the STX Gladiator. I plan on getting one myself. I have not tried the Eraser yet. I heard it is sapposed to be light and allows for easy movement.
I currently use a DeBeer Icon. It is about 1/2" thick. Provieds easy movement. The only downside is that it is not as protective as others. I still like it.
Check out
LaxShopper.com - the Lacrosse Marketplace to get some better reviews of different CPs.