I have a Grado Sonata and a few other MM and MI cartridges; two that I have that I prefer over the Sonata, for the sonic characteristics it seems you seek, are a Nagaoka MP200 and an Ortofon Black. The Nagaoka is very, very smooth and easy on the ear, but with plenty of bandwidth, and I like it for rock, classical and light jazz. The Black is an extremely detailed cartridge and is great for massed strings and complex passages. Some find it overly clinical but it certainly gets out what’s in the groove. I’ve been trying to settle on an overall performer but my current preference goes to the Nagaoka, truly an unsung brand among current cartridge manufacturers.