Best organic mattress for combo back and side sleepers?

My partner (190 lb) and I (160 lb) are in the market for an organic mattress. We both flip between side and back sleeping, no solid preference on firmness yet. We just want something that will be comfortable and last a long time but unfortunately where we live there are no organic mattress stores and cant try anything ourselves. I was thinking Happsy or Naturepedic Serenade, but I'm open to other options.