The top tier glass are the Leica Ultravid HD, Nikon Edge, Swarovski El and Zeiss Victory.
Each one has their own "view" and ergonomics which you really have to try for yourself.
What one person likes another may hate.
Iliya has tried them all I imagine and knows many of the strengths and weakness's.
You are paying for lifetime warranties and usually outstanding customer service.
The sample list has some Nikon, Swaro and Zeiss glass at decent prices.
Once you spend some time with some of the top tier optics they can become addicting.
Tier 2 optics include Nikon LXL, Meopta, Minox, Pentax ED, Swaro SLC and some of the better quality Chinese ED glass.
SWFA has a great selection...you have to decide what is best suited for you.
Most people decide they want something cheaper, go to Walmart and buy a bubble pack pair with plastic lens!
Steiner Military poro's are disposable, most of the time the optical bench people don't bother to repair them and throw them away, the military gets such a good deal that it doesn't pay to repair them.
Baker Marine repair people have told me that some of the models are sealed and can't be repaired.