The best two boards in the iSonic quiver are the 131 and the 111 with this two boards you have plenty of range in your sailing.
111 From 6.3 to 8m sails and from 40cm fins to 46cm.
131 from 8.5 to 10m and from 48cm fins to 56cm.
For fins try www.f4fins.com
great price and super good Carbon fins.