old can be best
we have '89 26.5' hunter with original u.k. sails. always given to local sail loft for washing and checking over every season - average of 45 dolars a yer. still beating much larger boats along barnegat bay with all sails up. cannot all be due to the capabilities of the complement on board our boat but good, if not most expensive sails, and a very well designed boat which sails very well close to ad off the wind.only good quality epoxy bottom paint - not the expensive racing bottom paint systems some people use.if i were you, i would have one or two sail lofts check your sails and have any wear and tear put right, ask them if the sail has become badly mishapen, such as the main becoming baggy in its shape - yu should have an idea of that yourself. if you have looked after your sails fairly well in the past they should be good for much longer yet. speed is not all to do with sails but their trimming, the condition of your boat generally which includes the bottom - having no areas where the paint is pitted or in indifferent condition, the ability of the helmsman and crew in handling the boat to greatest advantage. which includes having winches and all running gear well maintained. i might also add the complements' fitness!somethging i have noticed that towards the end of the season on our boat which is docked in the water is that she does not slip through the water so fast even if only noticable to an experienced skipper. the hull becomes dirty and even those few small barnacles on the water line make a difference. this seems a shame as as the season progresses, we, the complement are getting in better practice, etc.!check and consider everything else before the expense of buying new sails.from own experience you can change and renew everything but often the performance is no better than the person handling at the helm.hope some help.ted.