Dan,
I am aware fireline is fused and I wouldn't ever use it on a baitcaster. Fireline Crystal which we were talking about is a hybird type line different to Fireline standard stuff. I know a lot of bream/bass blokes who use it in the lighter department (4lb 6lb etc)...but not in the heavier stuff like Ken is chasing. As for mono on a baitcaster. I think he will struggle to get any decent spool capacity (Curado 200 - 14lb/110yrds)...so if he went with say 20lb mono it would be down to aprox 80 yards.
I used to use mono in my early days barra fishing on baitcasters, and found it worse for birds nests, poor spool capacity, and less casting distance. I DID like its reliability and shockabsorbtion ability and forgiveness when fighting fish, but it wasn't enough to go back to mono over braid. hence why I personally dont reccomend mono for the line class/reel/fishing style that Ken was talking about.
For offshore, on big overheads I only use mono now, gone away from braid..losing too many fish.
Cheers Steve