I use a couple of soft tool bags. Picked up a set of three bags, S, M & L, for $40 from Hardware House maybe 12 years ago, still going strong. I have a roll for my spanners, so one can always find the right spanner and never leave one behind.
What about the plastic cases with tools? If they were good enough quality would you be keen on one? All your sockets, drivers & spanners sorted, stored and secure.