I didn't think expensive binoculars were worth the money... . until my guide handed me his Swarovski's one afternoon on a CA pig hunt. Now I'm a believer. From what I've heard, Leica, Zeiss and Swarovski are all pretty awesome. The real difference was in the very early and late day where there was little light. Absolutely unbelievable difference. I am saving up for a set of EL and watching for sales.
I was on a hunt in Italy last year and used a Swarovski scope on a borrowed rifle. I was watching some boar right at twilight, and it was getting darker by the minute. It got to the point that I could not see the pigs with the naked eye, but the scope brought in enough light to still make them out. I was sold on that brand again at that moment.
On an expensive hunt where that shot may be the only one you'll get, the price is worth it. But until then, I'm using my Nikon Monarch ATB's which I got on sale for $200...