My bass currently has Pirastro Obligatos on it (I've had them on for about 2 or 3 months now), I love their boomy bottom and their arco response, but I don't really like the tone. They're quite bright. I'm a jazzer and am looking for something with a real dark, crisp attack (a la Mingus or Ray), but I still need good arco response (for college symphony orchestra). I was thinking of trying T-Is either spiros or superflexes, any thoughts anyone? I was reading in the newbie section that some people feel as if the superflexibles are darker and have better arco response...any thought on that?