Just a note of warning on that slower Ninetales - if you hit less than 303 Spe then you lose the ability to revenge-kill Excadrill (I think that's hit with Timid and 160EVs). Since your Tales isn't a stallish variant with Sub+Toxic/Disable/Protect or something like that, I'd think that you'd at least want to retain a decent amount of speed so as to cripple Dragons and such with WoW or get off a Power Swap against something, though dropping some speed for bulk could work nicely.
And man, I love your inventiveness :D. Durant's nice base speed looks fantastic for you, such a shame it isn't one higher so it can tie with the Latis... There are two suggestion's I'd give for him. If you use SE/Rock Slide over perhaps Crunch, then you can hit all the Bug/Steels and Heatran for neutral, whilst X-Scissor covers Ferro and the Psychic/Steels, so it could be a reasonably useful for you. The other possibility is Screech perhaps over T-Wave, which could assist you in taking out those opposing steels, but since you need it to kill the speed of a lot of things it's again really just an option I wanted to bring up.