I am a player playing lots and lots of both jazz and classical (I'm a double major in college). I want to say now that I am not asking for the perfect string, just want some insight on the D'addario Orchestra's. In my search I found that most people suggest Obligatos or Spirocores when people mention these strings. I don't like the feel of Obligatos on my bass, and I am not particularly fond of the "Spirocore sound." I have been using the Heritage strings for a while now and I really like them. They come very close to giving me my dream pizz sound for jazz. very warm while still having sustain. However, I am become increasing dissatisfied under the bow. Thus my question. Does anyone use the D'addario Orch Strings in orchestra or for jazz? The only guy that I know for jazz is Ray Drummond. I'm not sure what gauge he uses. For orchestra, my classical teacher uses them as well as some of the students here. I would say that the sound that I want is on the warmer side of a jazz sound. I really dig Scott laFaro and Dave Holland's tone if examples help. For orchestra I really want a deep warm sound (doesn't everyone.....) Any ideas besides Obligatos or Spirocores (or even ideas with them, maybe something to do with them????)? Thanks you guys.