Can't say that I see anything wrong with what you have there. Pretty good selection of flies that should have you covered.
My box is a C&F compartment box, and I just customize it for the time of year I am fishing. So, in winter & early spring I have BWO, blue quills, quill gordons, march browns, etc. in it. This time of year it has more stimulators, Adams (grey and yellow), neversink caddis, green/pink weenies, etc. And finally for fall I throw in some terrestrials, orange caddis, big nymphs, and streamers.