I play jazz for a living. Mostly pizz, but pretty much arco. I'm a geek as far as most gear, but have been pretty conservative as far as string choices. I've used Spirocores for the past 25 years. ( Mittels, I guess ) The set on my bass has been there for 10 years. I don't even start to like Spiros until they've been on for a year. A year ago I put an Obligato G and D on my bass. They match really well with the Spiros as far as tension and volume. I've just been a bit disappointed that they haven't lost a bit of a midrangey, nasal sound. I think that there might be better choices than Spiros and I'm wondering what you guys think. Never liked D'Addarios. I worry with strings like the Bel Cantos that there wouldn't be enough pizz "oomph" .Maybe the EP's? What I'm looking for is the sound and power of my 10 year old Spiros with a bit less tension and a little more openness.