Memory foam, shredded foam, latex, or down for side sleeping?

Solid memory foam (Tempur-Pedic, Cushion Lab) holds shape but can sleep warm and feel stiff. Shredded foam (Coop) is adjustable and forgiving but breaks down over time per long-term Reddit threads. Latex is springier and cooler but pricier. Down/down-alternative (Beckham, Downstoria) is plushest but typically too low-loft for broad-shouldered side sleepers without doubling up.