I'm thinking a Walther P22. . .I don't really know much about comparing .22s, though, and it's hard to find info about these guns in my experience, most reviewers and the like don't seem to bother with this caliber outside of rifles. . .
I have one. It shoots fine as long as you use the right ammo. I find that CCI mini-mags work great in it! Had some FTF/FTE malfunctions with other ammo (not that I have tried alot of different ammo).