Browning Buckmark I understand is a great gun. No first hand knowledge regrettably as I stupidly let one get away a few months ago!
I did buy a S&W 622 and have found that to be a great plinking gun. Eats anything you feed it. It is a SS pre-cursor to the S&W 22A, so you'll have to look in the used market but a great gun for $225-250.