From a purely performance-based point of view, it really is tough if not impossible to beat Seaguar Tatsu fluorocarbon. It offers a tremendous combination of low-memory, strength, and toughness and really does address pretty much all the usability issues traditionally associated with fluorocarbon lines. Some people even go as far as saying that it is more manageable than many monofilament lines on the market.
This premium performance however does come with an equally premium price tag and at $39.99 per spool, it is certainly anything but cheap.
The performance benefits of Tatsu over some other leading fluorocarbon lines on the market however may not justify the extra cash and for those that are slightly more budget-conscious, something like such as Sunline Super FC Sniper or Seaguar InvizX would be a great option.