The nitto is the best option IMO, is heavy tho. But wont bend and is knurled in the stem area too, so the stem wont slip at all.
U have 2 versions...
And the MTC-12 that is almost the same as the above but has a top cap that is threaded and the neck is longer so yo u can play with the stem better than with the other one.
I have a MTC-12 and the thing is way better than other stuff moving around, the nice about it is that U just put it all the way down and neck gets integrated with the headset and basically stiffing the front of the bike a lot.