The Vortex Optics Razor 10x50 Roof Prism Binocular are a pleasure to look through! Although pricey ($850), these binocs provide excellent eye relief & field of view (better than the Vortex Viper 10x50). Weighing in at just over two pounds and with the 50mm objectives, they are a bit on the bigger side - but that is a trade off we're willing to make for the view. If you are spotting for longer periods of time, you'll find these to be easy on your eyes - the adjustable eyecups are great for people with glasses - and it even comes with a second set of "flared" cups great for blocking incoming light.
If you are looking for a high quality pair of binocs - if you use binocs on a regular basis - and if you don't balk at the price tag, you've gotta give these binocs a serious look!