Re: loop to loop connection
I have used nail knots, No Knot eyelets, Eagle Claw line to leader connectors, Cortland leader loops, and have bought some lines with loops already in them. With furled leaders, the only way to go is leader loops, at least as far as I can tell. Personally, I prefer the Cortland leader loops, as I started furling my own leaders and the combination works best for me.
Any method of connection has advantages and disadvantages. You just have to experiment and find the one that works best for you. It will all depend on the line type and weight, species you are targeting, leader type/material/size, and probably a half a dozen factors that I haven't even considered. But my money is still on Cortland leader loops.
frus·tra·tion (frəs-ˈtrā-shən) n. Watching a nine year old with a cane pole and a tin can of worms catch his limit while you get skunked.