for the wall racks for saddles you need to be careful.... you need to find a solid piece of wood to put in the nails, do not attach to drywall or a thin wall (don't know how thick your stall walls are). If you properly attach them it should hold a western saddle fine, just don't throw it on the rack ;) Also, there are "western" and "english" saddle racks, and sometimes the english don't work for a western saddle (the "wither" is too high). My personal preference is to have any western saddles on a covered bench or a free standing saddle rack, mainly because they have so much extra stuff the gets caught if I put it in my saddle racks, which are rather close together.
For the wire-box I was referring to with the polos and boots, any box with holes in it will do. You just want them to stay dry and have a chance to air out, which is why I like wire.