I'm currently playing a mix of obligatos on the D/G and spiros on the E/A. The bass is a speyer 404 (3/4) with carved top and back, lam sides. Pizz 90-95% / arco 5-10% The obligatos sound fantastic up top, and even the A with the spiros is good. The E however it a little too cloudy/undefined/muddy, although it has fantastic thump and a very deep low end. After searching, it seems like a Spiro E is usually recommended to brighten up the bottom, but it's not quite bright enough. Any thoughts?