I would recommend a hydranet radial sail. More expensive but keeps its shape much longer than dacron. Hydranet is a woven sail, made of a dacron/dyneema mix; it does not haven the disadvantages of laminate sails
like sensitivity for moulds, shorter life and so.
Furthermore I'd strongly recommend a 3rd reef. I feel that above about 23 knots TWA close-hauled you need a 3rd reef. Reefing lines can be accomodated by adding extra blocks at the foot and collar of the mast
. I added 2 double clutches left and right of the original clutches on the coachroof, to accomodate 3 reefing lines and the outhaul
A square top sail has advantages (more push at light winds, 10% extra boat speed) but you have to reef earlier; raising the sail is a bit more cumbersome due to the battens hooking behond the lazy jacks; and the danger
of an accidental gybe due to wave action on the head
of the sail is larger. So a gybe preventer is necessary in more cases.
And take care that the reefing eyes at the mast
are large enough to let the reefing straps go through. Incidences uses too small eyes at the mast side of the mainsail