The Geovids are top drawer Mick, ive 2 friends that have them and a 3rd that drove off with his hanging onto his tow bar FFS. If my zeiss fail I will be investing in a pai despite the cost.
My opinion for what its worth, is buy the best you can afford and think very carefully about what you will be using them for before deciding on the magnification.
During the day most decent binos will hold their own against top end stuff, Its really about first and last light, you will get up to 5mins extra viewing out of top end stuff (no different than rifle scopes).
I invested in a pair of Ziess Dialyt 7x42 35 years ago, at the time it was more than 2 weeks wages, and with 2 small children it was a tough call. I sacrificed magnification for field of view and never regretted it. They have never failed so in real terms have worked out pretty cheap. If/when I buy another pair. I will probably get Leica Geovids in 10x42 it means I wont have to carry a range finder and my eyes need all the help they can get nowadays. .
Great thread, lots of different opinions on magnification.