Naca 12 series are good general purpose sections.

The naca 63 and 64 series are becoming more popular, especially for higher speed sailing boats.

If you can't be bothered putting a somewhat tricky concave section in, as the 63 or 64 series sections do, the 12 series is more than appropriate.

Profile wise, parallel for most of the length with tapered tips. The tips are pretty much up to your preference as there are a lot of different theories about.