Lots of good options, kind of like choosing between Lexus, Infinity, BMW or Mercedes. Most sailors choose based upon one of the following.
1. Sails used by top pros - This is contengent upon how deep the manufacture's pockets are and how may top sailors have been bought to use their sails. Neil Pryde is usually at the top of the list, but there are other brands that are just as good or better.
2. Shop recommendations - They will push what they stock.
3. Friend's experience - how good is your friend?
4. Price - who is offering the best deal. Year end close outs are always good, but the best racing sails are produced in limited numbers and they are rarely in close outs. You have got to get your orders in early (Dec. - Feb.). Just a guess.
5. Brand loyalty - Are you a BMW man?
6. Respect for the sail designers, their experience and history.
7. What they look like - Not many racers will care about this. Function over form.
Here's the pitch - I use Maui Sails, TR-3's and TR-4's. 6.6, 7.6, 8.4, 9.2. 11.0. I haven't recieved the new TR-4's yet.
I like Maui sails and in particular Barry Spanier and Phil McGain. Are they the best sails? I don't know, but I am the #6 kind of guy.
I have a F160 and is111.