I've stopped using flurocarbon on environmental and cost grounds and think I've found an alternative that suits my fishing down to the ground. Snowbee Magic Line is cheap at 3 quid 50 for 100m and is very low diameter at 0.185mm for the 6.6lb beaking strain. Unlike other low diameter lines I've tried (like Trilene- total Keech) it is quite stiff and doesn't kink when you stretch it. This stuff just feels right to me.