Silicone Options
Silicone dolls carry the widest option list of any material. The body itself can be specified in more than one density, the skeleton comes in more than one grade, and a long tail of smaller upgrades affects the hands, feet, chest and intimate areas.
Several of these interact. A head type limits which hair and eyebrow work is possible; a skeleton choice changes which poses hold; soft parts and gel fills change the doll's weight and how she should be stored. Where an option pairs badly with another, the page says so.
Work down this list roughly in order. It starts with the decisions that shape everything else, material and head type, and ends with the smaller comfort upgrades.