Sam,

I belive the "standard advice" for cat foils is NACA0007 for daggers and NACA0012 for rudders.

Then the customization and differences in philosophies starts. From there follows a big debate where I quickly am out of my depth. Some of these discussions seems more like religious debates than fact based ones (you can choose which facts to select and debate from). In the end it comes down to who to trust.