There are several really good nylon brands available on the market and they are obtainable from Tackle Tactics. Phill has an excellent selection.

One line I do wish a wholesaler would import is Amnesia, as you can tell by the name it has no memory whatsoever. If you get a curl, simply run the line between your fingers and it is straight once more. This is the trace line most of the top European match anglers use, a little expensive but well worth the extra.