I've been using the NGT lead free leader. I find it far more supple, and just superior in every way to any leadcore I have used.......except for splicing, it's a right pain. the best needle I have found is the korda splicing, or purple needle. I have broken loads! I alway make up leaders at home, and wouldn't dream of trying on the bank!
I splice 2 to 3 inches, simple as that, no glue, no stitches, and it holds great.