If you want smoother and more refined, but still want higher-than-vintage output, maybe the Abraxas set?
I've only owned the neck model (which, like the Mule and Crawler neck models, has an Alnico IV magnet and lies inbetween the two output wise). But from what I've read, the bridge model has a smooth, not-too-edgy sound which might be what you're after. I don't think it's as dark or growly as the Crawler.
One to check with Tim, perhaps.