So far, I still really like the Park. But I'm partial to beam wrenches. It won't fit in a range-bag though.
The Wheelers are handy but I haven't inspected the mechanism. I have the one which was donated and still need to dissect. I'm behind schedule!
The Borkas seem really good... even though I haven't tested them yet. Very simple design, and will fit in a range-bag.
If I had to buy right now, and not worry about putting the wrench in my range-bag, I'd go with the Park.