Measure the length you have now. Diameter shouldn't be less than 5/16 IMO and you can go with $$$$ like endurabraid, warpspeed, swiftcord or $$$ like salsa/Apex or $ like bzzz, trophy braid. Ultralight would work also, though I like the idea of single braids for the spin sheets. Bzzz is good stuff though not as durable as the others and probably absorbs more water (trophy absorbs a lot). I have personally used trophy, bzzz, and salsa. Salsa and bzzz seems equivalent to me really though the salsa is probably better.
If you aren't highly competitive then go with the bzzz. 0.67c a foot, don't see it in the online catsailor store though.