Free: Contests & Raffles.
I swear by my Nikon monarch 10x42. And they were cheap enough that it doesn't bother me to take them hunting in rough conditions. Not to mention the warranty is a 25 years no fault policy
Buy the best you can afford..Heck, I just bought a pair of Redfield 10x42 Binos this fall, love them.
I use Swaro 7x30'sB SLC's and the glass is so good, the image from edge to edge so crisp, that I do not feel handicapped by just 7 power.
Definitely go with the HD/ED/LD quality glass. The suffix varies from one manufacturer to the next but will consistently put you in the top tier of that manufacturer's range. Plan to spend $1,000 or more unless you can fine a screaming deal on Craigslist. Consider the Leupold Gold Ring HD, Zeiss Victory, Nikon EDG, Vortex Razor, and of course, Swarovision. Let us know what you pick.