My vote: Kaname and Yuki together forever
(Zero remains her friend and becomes Vampire Hunter's President) -
Really, This is how i believe, then compared to having it turn out to being a ZeKi relationship in the end definitely wont make much sense to me. Considering 1) Hino point out that she have 2 arcs for VK.
The first arc, she have already made Yuki chose Kaname, but sadly at the same time she have started a love triangle in her story.
The second arc now, Hino is continuing this love in her story 'still having YuMe being CANON' by the fact Yuki have resolve to believe in Kaname and find him again... (and showing all of us that this is the path she have decided to follow to the end).
I find it more believable to have the second/final arc resolve the conflict (love/triangle) that have started of in the first arc.
Although Yuki have chose Kaname in the first arc, but 'he wasnt really completely able to move on with his life'.. A part of his heart still hate Yuki as a pureblood. This is how i see it, While Hino is having Yuki continue believing in Kaname (determined to find him again), she is at the same time making Zero realize on HIS END that Yuki can have such faith/belief in him. A message that Hino might want to point out is 1) Zero have to see all this to realize that the pureblood Yuki have always been the same Yuki that he knew ~ he need to resolve all this on his end - so he can see his path clearly and finally being able to move on with his life.. and at the same time, Hino might want Zero to lift that hatred he has for all pureblood (and have this resolve on his end) so he no longer 'feel the hatred for Yuki as a pureblood'. I am not saying this as a restart of building a romantic relationship (restart this love triangle) but in a different message i meant this arc might also be about resolving the unclear conflict/feeling that was started of in the first arc ~ Zero have lost the chance to build up a romantic relationship with Yuki (a message that needs to be pointed out to most 'love triangle situation' - its cruel - but this needs to be done so the third party can see their path clearly/resolve on their end and move on)...
Looking at the story 'from this pov' - it will make more sense to have a YuMe ending than compared to switching to having a ZeKi ending - considering that the whole story so far is creating a beautiful love story that had an organic, believable build-up for more then 10 years (If this is how Hino plan to make her readers feel, than it will make no sense to end all this). The whole 76 chapters to me, was YuMe (considering both Kaname and Yuki loved each other before the first page of Vampire Knight Chapter 1 was turned). Looking at this pov, and how she is having Yuki wait for Kaname - it is very unlikely to suddenly switch to becoming ZeKi (especially when Hino said she have this story all planned out before beginning it) - So On my end, im happy - since im with YuMe all the way!