I'll use fluorocarbon in the summer, H2O Yo-Zuri. I used to be an old Maxima Ultragreen veteran but if a stealth leader is not needed my favorite material has been Pline CXX moss green last couple years. It has the stiffness you are looking for in a leader material and is tougher than nails. If you like Maxima Ultragreen try Pline CXX, it handles like Maxima Ultragreen but on steroids. One of the best lines tested for breaking strength.