Discuss! 
We all know the usual birdwatcher's choice is 8x42, but I read with regularity on here ravings for 7x42. The advantages being FOV, viewing ease etc. What do we think? Part of me agrees with this, but another, more mischievous part of me thinks these musings are akin to audiophile bores spouting on about bi-wiring and pre-amps! :-)
Both the 7x42 and 8x42 are good choices for your main birding bino. There are more choices in 8x42, and there seem to be a lot more good medium-priced binos in this configuration. It's really just a matter of personal preference. I use an 8x42, but if cost wasn't prohibitive, I would probably be using a Swaro 7x42.
7x42 is the BEST forget the rest. I tried all the configurations and 7x42 blows 8x42's away everyday!
Dennis