I'll plug my favorite again since nobody has mentioned it: Gamakatsu.

Its thin diameter, pretty strong and abrasion resistant, and well behaved. I use both 8 and 10lb on my Spirex 2000. It is categorically stronger than Trilene XL or Ultrathin, but not as strong as the thicker muscle lines I use on casting reels (maxima, trilene XT).

I have had little success with the thicker, stiffer lines on spinning gear, particularly float fishing, since you're often reeling in slack line. Andes ok during the summer, but it will fly off your spool as soon as you open your bail on a cold day.