Another vote for the Mark II. I also have the bull barrel and it is a lot of fun to shoot and extremely dependable. My wife is not a big fan of guns but even she had fun when I had her shooting targets.
You can't go wrong with either a Ruger or a Browning. As far as used guns go, if you can find an old High Standard they are great guns too. As far as what you'll be using it for there are other considerations. If you just want one for plinking any of the above will work. If you want to get into target shooting then the Browning will be better then the Ruger. The Browning's come out of the box tack drivers, the Ruger's need some customizing to be equal to the Browning. Unless you pay the big bucks for the high end Ruger with the flutted barrel.
One of the Rugers I used was a stainless target model with adjustable sights. It had a bull barrel that was around 5" or so. That gun was a tack driver. Probably the most fun I ever had shooting a 22. IF we could hunt with them I would have one.