When I started out tossing big swimbaits, it was recommended to use the Berkley 100% Fluoro. I loaded my 6500C with 25# test. What a disaster! Kinky and loaded with memory. I went on some swimbait sites and talked with Bill at Bill's Bait in Norton Mass. They recommeded Triple Fish Perlon Mono instead. I loaded up my 6500 and have never looked back. Must better casting ability, low stretch and toughness. For tossing swimbaits, this is one fine monofilament line.
As far as fluoro goes though, I use it on two of my lighter rigs. I have to use the Vanish Transition though, due to these older eyes needing to actually see the line. Both these rigs have 8# test on them and I've never had a problem, either with knot tying/strength, or excessive memory. Both these rigs are what I use for smallie fishing when presenting tubes or Senkos. Works for me!

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"A voyage in search of knowledge need never abandon the spirit of adventure."