Ruger Mark IV tops my list. It strips like an AR upper for easy cleaning. Accuracy is also very good. Next will be CZ Kadet, Browning Buckmark Contour or any of the Buckmark series, Ruger Mark I-III (accurate and reliable but damn tricky to strip and clean). GSG 1911 is cheap and fun, but requires upgrades and constant slide lubrication to run smoothly. Unless they have improved the slide material, you might need a slide rebuild as it wears out like crazy and rattles after 20K rds. Or get a decent rimfire conversion for your centerfire pistol. You can find good conversion kits for Glocks, 1911s, CZs. GSG also makes conversion kit, but suffers the same fate as the pistol, weak slide rail that wears out badly. Yes, they are cheap, and you get what you pay for. CZ Kadet kit is highly recommended, so as its clone: Antreg Zenith available from a supporting dealer out west. I have one, and it ran perfect with stock springs. It will be finicky with upgraded springs in your CZ pistols. Advantage Arms 22 kit for Glock seems to be good based on reviews. Marvel, Ceiner and Nelson conversion kits has some good followings for 1911. Hard to find here, but worth exploring if it pops up on the resale market.