My personal opinion is that between North, Doyle, Quantum and UK the products are all very good. There are some advantages to the sails with no seams such as the 3DL but I think all the big players have these. The difference comes down to the loft you deal with. If you have a sailmaker that will spend time with you on your boat fitting the sails, tuning the boat to the sails and then sailing with you to help set lead postion, sheet tension etc, this will make the biggest difference. Find the loft you want to work with and buy their sails.
David
#397