Although I've been happy with Elixir PB strings on my GA3, I decided to try D'addario coated strings for a change. I've always liked their regular strings on other guitars. The Elixirs were over a year old and still sounded OK but I figured after a year, they needed to be changed, right? Put on the D'addarios and there wasn't much difference. They didn't sound bad, but they didn't sound like new strings should sound. Maybe it's because the Elixirs really didn't need changing yet (even though they were over a year old, I alternate between 3 guitars so they probably only had 6 months playing time.)
At any rate, it's back to Elixirs next time. If it ain't broke, don't fix it!