Newbie upright bass player here (2 yrs). I've got a new Englehardt S9. I've just added one of Bob's fine adjustable bridges and am now ready to add some new strings. I play only pizz (bluegrass). I may try a bow at some point, but for now, just pizz. The orginal strings broke, so I'm currently playing some loaner Spirocore Mediums. They sound ok, but not great. The G seems pinched and lacks warmth. They are also pretty stiff, but I'm hanging in there, working on getting the hands toughened up ... After much reading on these forums, I've narrowed my choice to Corelli 370's, or Helicore Pizz. Corelli's because they are reported to be easier to play than spirocore, have a great tone and warmth, and I like their price point. In addition, Bob recommended them. Helicore Pizz, because I've read they are also easier to play than spirocore and have a warmer tone. They're also reported to have good durability. I'd like to know what folks think about this. Am I off in the weeds on this? What would you choose? How do these two sets compare sound-wise, and durability-wise. Any help is appreciated. Thanks!