I agree that the Duratech kits are all wrong for your bike collection and a waste of money. They have things that only fit modern bikes (cassette removers, two piece crank and external BB removers, threadless headset tools), while missing the tools you do need (crank remover, BB lockring remover, headset wrench, etc). Awrycycle has a good list, though you can almost certainly reduce the cost by buying some of the standard stuff (box or combo wrenches, big adjustable wrench, allen wrenches, etc) from some place like Harbor Freight.