I spend time looking for such shots, and I agree, #1 is the best. Do you have a few others from the opposite direction?
The faces seem to me to be the key feature and #1 has the woman looking the other way. I agree with Breeze - the cowgirl in #3 isn't engaged in the conversation. In #2 there is a serious dialog going, and I don't think the man is buying it. Maybe cropping similar to #1 would give it more power. Anyway #2 gets my vote. Interesting shots.
I agree about the cowgirl in #3. I guess I like #1 the best. I would have liked to see what's on the signs.
Here are a couple from a different vantage...