I'm going to join the swarm at Newgrange I think, Munich is organising another Winter Solstice Blitz this year starting at Baltray again I suspect so might join them there or go to Newgrange first then join the rest after that. No firm plans yet though.
One place I know I'll be heading for is Dowth for sunset, the once a year opportunity to see some of the rarest carvings in the Boyne valley.