Marnold, which bass strings did you like best? I think Rotosound makes a special "high tension" set for a certain kind of bass. Maybe you got them instead of the regulars. A lot of dudes at talkbass.com really like rotosounds, especially the flats which are very popular there; Thomastik seem to be the ultimate in quality flats but are around 60 dollars US. A lot of guys I know use roundwound Rotosounds. Everything seems to be stainless, even the "monel" alloy Rotosound uses. I would like to try nickel wound flats or pure nickel flats.