I want a new set.. 4 strings 40\105 45\105 i think about DR & D'ADDRIO i from isreal i want to buy 2 set because is cheap then in isreal ok first question- what the diiferent between Nickle & Stainless? because in hebrew these is a different meaninig! so i want explain what kind of series tou advice my to buy in both company? and d'addrio...i well happy to know what there good strings sets. In Short- i want advice to 4 strings set of DR and D'addrio THanks!!!