Ruger Mark IV, Browning Buckmark will be my primary choice. Ruger SR22 is not bad. Smith and Wesson 41 is a very good target pistol though not specifically classified as a competition pistol. CZ 75 Kadet is a very good .22 pistol if you can find one. A CZ 75 Kadet conversion kit is also highly recommended. Glock is not available in .22. But good third party conversion kits for Glock is available. But for overall value, a GSG/SIG 1911 seems to be the cheapest. The only downside with GSG/SIG 1911 is premature slide wear if you go light and cheap on lubrication. But before getting this GSG/SIG into a rebuild condition, it will take thousands of rounds before you will have to replace the slide and barrel. Depending on how much you are willing to spend, for $500-700, go for either Ruger Mark IV or Browning Buckmark (brand new) or even a Ruger SR22 an M&P 22, and a Walther P22. $ 700-1000, go for CZ 75 Kadet or a used S&W 41. Around $ 300 will get you a used SIG/GSG 1911, spend an extra $ 100, you will get them brand new.
But before you buy any of these pistols, try any of them. If you are currently member of a club, politely ask your shooting buddies to try their pistol. Buy SV and HV ammo, ask them what suits their pistol and shoot few rounds. Don't go cheap on ammo as this might cause frustrations as soon as you experience FTF, FTEs and other malfunctions. Not gun related, but some rimfire pistols are ammo picky.