I currently have the emissary wich is absolutely amazing!
also, i saw that now it is available in a matte black finish wich looks sick!
eitherway, I vote for the emissary since the blade just flies out and takes a wicked edge. Not to mention it looks incredibly fancy. One thing you have to consider tough, is that you will have to add some grease to the axis lock frequently, otherwise the closing action wont be smooth. Tis takes only 30 seconds tough. You have to add grease to the area that the blade bottom contacts the axis lock so it can slide smoothly.
That being said, i really do like the looks of the shoki and megumi and have been tempted to buy them for a while. For what it's worth, i have hear rumors of the lock being unreliable, but I cant give you my experience on that, because as I said, I dont own any of those.
ps, the black emissary is called the 470-1