I wasn't pleased with Grid's available options at all (or Blizzard's font for their own raid frames), someone suggested Grid 2 but it's not maintained very well apparently. So I just started playing around with the addon I use for my player frames, Pitbull and it's turned out pretty nicely.
When further than 40 yards range the frames are transparent so they don't annoy in big groups like for AV and IOC battlegrounds or Sha of Anger.
Here you can see them in range, still transparent though in 10 man mode they are less transparent than in 40 man mode for obvious reasons. In PVE they'll also show 2 debuffs.