You should aim for above 1200. It actually makes a huge difference. I was amazed at how much I noticed it when I went from 1100 to 1230 a few weeks ago.
Speaking as a healer, I'm just happy if you can clear 1k, or have full recruit. 1200+ is great, but I'm fine with 1k. Obviously, for a min-maxing PvPer, you probably want 1200.