I have a pair of Pentax DCF MC 8x22 in a small camera bag zip tied to a shoulder strap of my Camelbak. It is great when I am hiking. I can reach over and pull them out to look at wildlife etc.

I think it is worth paying extra for phase coated prisms if you can afford it. I think for a PSK 8x20 to 8x25 is the right size.