I am considering a replacement for my Belcanto E string, arco only. It's a 42" 7/8ths bass. It sounds warm and deep but I have a feeling a deeper punchier sound may be possible with this bass. Hopefully I'm not trying to 'fix something that ain't broke'. The bass currently has Belcanto E,A,D and medium Passione G. The original Belcanto G started to sound scratchy so Steve at String Emporium recommended the Passione G, which fixed the scratchy issue. My teacher uses Spiro E and Belcanto with his old Italian bass but I know Spiro is not right for this bass. I have tried a Spiro E in heavy and medium. Great for piz but way too scratchy for the bow with this arco only bass. Best sounding so far has been the Dominant E, but it is a stiff string that is hard to bow. Thinking maybe a Permanent E. Never tried them. Maybe the Flexocor in stark. Any others?