Crazy Kenyon, what's up? Been even busier than normal for months now, so kinda out of the loop somewhat. From a quick glance, it looks like you guys covered a lot of the note-worthy non-boutique, non-region-specific models coming up.
Corsair continues to underwhelm with overpriced products people will continue to buy anyway; BitFenix on their game; Cooler Master being surprisingly disappointing (maybe not?); Lian Li still not quite right on usability; Fractal Design finally makes the Arc XL official (remember how many months ago I mentioned it? And how many months old I said it was at that point in time?), Rosewill trying, but yeah...; others.
My mobo was the one that got recalled... But I didn't send it back because I was foolish. It's failing to the point where I can have an optical drive OR a HDD but not both.
My CPU is not a K model. Vanilla 2500 because the k had no release date when I was purchasing.
Unfortunate on both fronts, then. At least 1-2 Z87 m-ITX boards are already available, with the newer models releasing over the next handful of months. You won't get many specific launch dates with Computex debuts, mainly estimates.
Consider your usage, from the games and software you run, to how many of them you run concurrently and how taxing each one is. If the 3770K/4770K aren't prohibitively expensive where you live, they will have greater performance and flexibility, for longer than the i5s. Again, only if that higher price is worth it to you in how you use your PC and how long you intend to keep it.
That 2600K Haz mentioned, along with a used or moderately priced new board could also work as a low-cost route.