Oops! Zooms are not good, narrow FOV. If you need power and then a wide field for general use, buy a 12x, though they may be big porros (Nikon or Bushnell 12x50, the 50mm is so it is not dim, as smaller one would be), and then a smaller 8x. Use both or at least bring both along. I have no other good 12x to recommend, but Nikon ProMaster (under the Travelite name in UK), a small reverse porro, does come in a 12x. It is real narrow, some 4 degrees FOV.
Other than that, get a 8x40 porro, Nikon or Optricron.
ZOOMS look like this: at low power thy may be bright and sharp, but narrow. As you zoom in, you get dimmer quickly, and the final power is usually not a clear image, slightly blurry.