I have always had Spirocores on my laminated Cleveland. I like the spiro sound but have the itch to try something else. I have Obligatos on my previous bass and really liked the mellow tone. I am debating between Obligatos or trying something entirely new. My Spiros are several years old but still have a nice tone. I would be interested in trying a darker, arco-friendly string. What are you NS laminated owners using? Are you satisfied with what you have? What other strings have you had on you bass?