The Vaquero balances well, feels really good in the hand. And it looks good. If your primary use will be as a plinker/range gun, it is a good choice. Unfortunately, the Vaquero may or may not shoot to the point of aim with a given load - or with all loads for that matter. Most do shoot pretty close to point of aim, but not all. This can be corrected but what casual shooter wants to go to the trouble. I have a Vaquero with a .45 acp cylinder and it is right on the money at 25 yards. I've seen others that were off by several inches.
The Black Hawk isn't nearly as pretty as the Vaq, but it is strong and it has adjustable sights. So if hitting your target matters a lot, obviously, the Black Hawk is the sensible choice. You probably think there is little to be gained from an action job on a single action, but believe me, it will make a big difference. If you don't want to spend for an action job, then at least put in a set of Wolfe springs. You can do it yourself. Remove a tine from an old fork to make a handy compression tool.
I have twenty single action revolvers. A dozen are Colts; the others are six Rugers and a pair of Uberti conversions. The ones I use for hunting are all Black Hawks and Super Black Hawks. However, the others are the ones that get most of the use. They are for entertainment. The Vaqueros are great entertainment pieces because I don't mind abusing them. I do things to them that I wouldn't think of doing to the Colts, fanning and that sort of thing. So either gun is a good choice depending upon what you want the gun to do.