i just ordered a wera bitcheck kit from kc tool. on sale for 55.99. sae or metric with a bit ratchet, handle, bit holder, bits and sockets. all in a handheld case.
if you don't have one, a chapman bit set is hard to beat. the large set is 99 bucks and covers most things. their bits are well regarded for gunsmithing work and i know you have an interest in that as well.