I have a simple bed base that someone gave me. I threw away the mattress replaced it with a cheap foam matress. Put some extra slats (might change to a sheet of plywood later) as i only like hard beds. Added a headboard and a footer to prevent the foam mattress sliding when I sit up.
Egyptian cotton sheets, goose down duvet when it gets cold, high quality pillows. I sleep like a baby
Something like this.

