A strange thing comes over me when I pronounce
Tara. I say it with a short "a" as if I'm from New
York, which I'm not. Between the two you have listed, I'm closer to the "TEH-ruh" sound.
It's not dated to me because I'm Irish. But I can see how others might be tired of it. But that means that there won't be many
Taras in this newest generation, so your dd's name would be unique among her circle.