Depending on how much work you are willing to do and what your budget will bear, here is what I would consider doing. If ceiling joists are more than
16" on center cross brace the joists at 16" on center and use BC plywood. Use 3/8 or thicker plywood and screw it up there. If the joists / cross braces are 16" on center the ceiling will stay flat. Having a strong plywood ceiling will allow you to screw things up there anywhere you want. For heavy loads a molly bolt through the plywood will be very strong. If you think sheetrock will be quieter attach it to the plywood and still get all the plywood benefits. Charlie