I consider the Colt Woodsman Match Target the Cadillac of .22 pistols. The stadard woodsman/huntsman is the king of plinkers. Unfortunately, they aren't being made anymore but they can be found on the used market.
Rugers are built like tanks, easily affordable, and pretty accurate. There are tons of aftermarket parts to fix the weak spot... The trigger. And enough custom parts are available to modify it to your hearts content.
Browning are well made, have better triggers than the rugers (in my experience) and have a moderate aftermarket support.
The Sig Trailside is a very good target gun, and in the standard trim makes a great plinker, The triggers are good out of the box. It was my understanding that they are rebadged hammerlis.
The smith and wesson 41 is another fantastic .22, with an outstanding trigger and excellent reputation. A little pricey but worth every penny.
I doubt you'd have regrets with any of these. But they all have there strengths. I wouldn't shoot really hot .22's (stingers, velocitors, yellowjackets, etc.) out of the Colt, S&W 41, or the Sig/Hammerli. They are target guns. I believe the ruger would be the best choice for the hot stuff. However, if you are looking for a gun that will get ooohs and aaahs at the range, find a Colt Match Target or a S&W41. If target competition is a possibility then look to one of the target guns.