Firstly, yes, I know - "Use a real wrench!"
Now that we've gotten that out of the way, I often find myself on the opposite side of the farm from my shop with just the little toolbox I carry in my SxS. I also often find I need a wrench size other than the four that I carry (because they are common to a lot of my irrigation equipment and pumps). Hence I carry several crescent wrenches.
I have a couple of big ones (10" and 12") that I inherited from my dad. They are way old school Craftsman, probably from the 60s. Man, they work like a real wrench. You set the size, and they are solid. Quality. My smaller ones are all crap, including some 2000ish era Craftsmans. Don't hold their setting, loose as a goose, etc.
Does anyone have recommendations for modern, GOOD crescent wrenches? Nothing I've tried in the big box stores seems any better than my current crappy wrenches.