Ok, so I'm a cellist, who just bought a bass guitar two days ago. its a used Cort Action bass. the strings on it are crappy and worn out so I'd need to replace them even if I weren't doing any drop tuning. What I want to do is tune my bass to C-G-D-A, so it parallels my cello, just an octave lower. as it stands, down tuning, especially the E string down to C makes the tension sloppy, the tone muddy, and it slips out of tune far to easily. the top string on the other hand I have to actually tune UP a step. what strings would you recommend for this? particularly to keep it from slipping out of tune? I plan on mainly playing metal. thanks.