Well I have some Ernie Ball Slinky Nickle Roundwound strings. The E string is 105. I love them, the sound is great, but they're too damn thin! Being that I couldn't afford a 5-string bass for my life, I do a considerable amount of tuning down. My 100 gauge strings before were even worse, and the ones I have are a little better, but If I tune any lower than a D, it's unbearable! The string's just too floppy. I want nickle strings because I like them better, but I want them thicker, so I can tune them down to let's say a C without it being too floppy. What gauge/brand would you recommend?