S-guy...Welcome aboard. I'm not qualified to comment on your Beneteau but the med is a big place and a week long passage is blue water cruising so I would do everything I could to insure safety as you put the boat together. To my mind that means a mainsail you can deal with if something goes wrong and therefore would suggest either a fully battened OR BOOM furling
system rather than in -mast as neither requires you to go up the mast if something goes wrong. The boom furling
is a bit pricier than in-mast but it is easier to deal with and allows a good full-batten mainsail instead of a compromised sail. How are you gonna get her home when you're done with the med?