Since I am using an ultrathin foot long Nickel-Titanium leader which is directly ahead of my lure for 90% of my fishing I figure that the visibility of my line ahead of that doesn't really matter. I use a line that I like to work with and for me that's Fireline Crystal.
For jigging, when I tie directly to the jig I think there might be an advantage to using 6-8 or even 4 lb test mono.
Since jigging is such a small part of the overall fishing that I do while canoeing I am just using the same 8lb Fireline that I use for trolling.