I just bought a new pillow. I'm a side and stomach sleeper. The research I did recommended a 50/50 fill of down and feathers. I haven't had the new one but a couple of weeks. It's a little fuller than I like but I'm sure it will squash down over time. My old pillow as so flat I might as well not use it.
I bought a down substitute for my DH and his actually seems a little softer. It doesn't seem to be stuffed as full as mine.