$200-$400 is a fine budget. I hunt with a guy who uses $1200 Swaros...he can not find or see anything I can not. I agree with Art, and at the distances you are wanting to work, even the $100 class will be fine. I'd not suggest the compact $30 versions if you plan on glassing for any period of time, but the full sized ones are not bad. I keep a pair of cheap binos car too.
I like Burris, and I have some Landmarks and some Signatures, 8x and 10x, about $150 to $400 depending on which model, but there are a lot in the decent range. Vortex makes some great ones too and I use their 10x monocular.