I just received a Rumblefish XL that I purchased on eBay. It sounds HUGE with a lot of low-end! I like it ! However, I believe it still has the factory SIT strings on it, and I don't really care for them. They're not bad, but I've liked other strings a lot more. I'm limiting my search to nickel roundwounds. I'm really looking for some strings that will add presence to the sound of this bass. Right now, I'm leaning towards trying some Thomastik-Infeld Power Bass strings. I've never used them before, so now might be the time. Any help you TB'rs can offer will be greatly appreciated. Thanks .