I would say that Jack''s (Whoosh) advice is great.
There''s a mantra many use: "The bitterness of low quality remains long after the sweet taste of low price is forgotten". In this respect, I suggest you buy your primary pair with good quality in mind, but that doesn''t necessarily mean you have to have a certain brand or pay above a certain price.
For myself, I bought top-of-the-line Bushnells (7x50, waterproof, float, lighted compass) for about $250 and am very happy so far (but we haven''t used them for 20 years yet, either). Bushnell also makes some much lower quality products that I would not buy for this application, so generalizing by brand name is not always wise.
Good luck with your purchase.