I use La Bella strings on my Spruce. They are nicely balanced, with clear and distinct tones. The low g is sold separately and is wound.
Spruce is a very bright wood. Instead of toning it down, I like to embrace it- as long as it sounds good.
I like La Bella enough that I am going to try them on some of my other uke, too. They sound good on both of my Pepe's (the CBU is mahogany).
Use what talents you possess; the woods would be very silent if no birds sang except those that sang best. -- Henry Van Dyke