Speaking of common guns and not some Olympic grade specialized target gun of some exotic sort, Smith & Wesson gets my vote for both semi-auto and revolver. The S&W Model 41 for a semi-auto and the S&W K-22/Model 17 for a revolver and both shoot better than I can hold them. Like a dummy I swapped my M41 off years ago to a local club target shooter that just couldn't live with out it. I have replaced it with a couple of Ruger MK series semi-auto pistols and am very happy with their overall performance. For the money the Ruger is hard to beat. Happily, I still have a couple of Smith & Wesson rimfire revolvers so I'm ok in that department. To my mind nothing is more useful and fun than an accurate and well built rimfire firearm, be it a rifle or handgun.
Doing the Right thing isn't always easy, but it's always RIGHT!