EIR/Sitka 12 fret GC here. I tried a few as well - DR Rares, D'Addario EJ16, Red (yuk!). For this guitar, I came back to Elixir PB lights. I like the tone and longevity. More importantly, they solved intonation issues I was having with other strings. I know, could have been fixed with a set up, but I didn't want to spend the money and the Elixirs worked out just fine. Happy camper here...