K2 doesn't really do reduced footprints. They're average.
I quite like my Flow Hylites, if Flow's carry build quality and whatnot down the line then either the Maysis or Flows.
All that said, the best boot is the one that fits your foot. Even a boot that's structurally less supportive will end up being more supportive if it fits better than they stiffer counterpart. In other words, you'll only get say like 70% out of a poor fitting boot, so 70% of more support, or 100% of a little bit less.
That thing I do to escape the world and have fun with my friend