Try a set of medium tension Ramirez strings with carbon G. My friend has those on her Guitarra del Tiempo and they sound great. I've used those on my 125 anyos and they sound good. I've also tried Savarez Cantiga basses in medium tension with Dogal Diamanté trebles in regular strength with good results, and D'Addario EJ45 with good results as well. The Dogal Diamantes are a carbon/nylon hybrid.
Out of the three, I am going back to the EJ45 as they are cheapest, and believe it or not, they sound the best on that particular guitar. Shhhh....don't tell Peter. Actually just about every string I've tried on the anyos sounds good. Just that some sound different. The D'Addarios are a very neutral string. You get the tone of the wood, in my case Cedar, but as yours is Spruce, you may likely want the Ramirez. They are a little warmer. But spend the extra 3 bucks and get the carbon G set.
Those are the three best sets I've tried. I've also used Savarez Alliance/Corum, Savarez traditional nylon 520R, Augustine Classic Red, Hense 500MT (all of these are medium tension)
As well as Augustine Classic Black, and Savarez traditional nylon ( these both are low tension, but the Savarez low tension is almost identical in tension to the med tension D'Addario EJ45. About a pound difference. These sets still sounded good, just not as good as the three I mentioned in the first paragraph.