Optics are like computers,there are so many choices and such rapid advancements it's hard to say anything with surety. You need to determine what power resolution is comfortable and fullfills your needs. For many years 7x35 was the standard for lightweight Birding glasses. Hunting optics has given us many more options. You must insist on fully sealed, weatherproof bodies. Note I did not say waterproof. You dont have to be in a rainforest to experience nitrogen leakage and fogging. Sometimes looking at old technology helps to understand the advanced technology of today. Check out www.deutcheoptik.com and www. sovietski.com Deutsche has an extensive inventory of reconditioned optical gear, Including East German border guard glasses that are still amazing. There is a form you should acquire from U.S. Customs BEFORE leaving the U.S. I know of several people who had to pay duty on Japanese lens purchased here and taken overseas.<br><br>