I would be sure that I got quotes from a few sailmakers (including SBO). When you get the quotes find out about the type/weight of cloth. Not all cloth is created equal. There are also many ways for a sailmaker to cheap out on a sail (thread, hardware, rope etc). When you look at a finished sail they MAY not look much different, but you may find out how different they are in 4 or 5 years.
You also want to be sure that every one of the quotes contain the exact same specs (loose footed, number of reef points, tell tails). Many of the offshore sailmakers farm out their cutting and sewing. While many of the major sailmakers have lofts offshore, they are typically their own lofts with their own people. The offshore companies may have difficulties making anything special other than a basic sail. You also want to be sure that you get the cloth that you were quoted & paid for.