I'd pick a walther PPQ .22
It has a full slide, very closely mimics the 9mm model, is fairly accurate, and mine is not that ammo picky. Mine hates bulk pack winchester (They stick in the chamber and leave a tiny chunk of lead in the barrel/chamber, and won't extract without a cleaning rod or wooden skewer.), but anything else flies. Mine is not that accurate with CCI, but remington, aquila, and SK shoot well. Federal is ok, not great.
No mag safety. No grip safety. No mechanical safety lever. Slide is aluminum, not some zinc alloy (So it's a touch heavier.) The trigger is very good, at 4-5 pounds, and has a very short reset. It has a 1:10 twist for some reason. That may contribute to ammo sensitivity. Don't know. Magazines hold 12 rounds. One of the things that isn't in the specs is how amazing the PPQ feels in the hand. The ergonomics and trigger are as good as it gets without going to a target pistol.
Limited to the options already up there, I'd say the M&P .22 from S&W. The full size model is imported (Made by Walther for S&W.) The slide is made from zinc alloy. As a result of the lighter slide it may be more reliable with standard velocity ammo. I don't know the twist rate of the barrel.
Depending on the model it may/may not have a mag safety (Every one I've seen has the mag safety but there is supposed to be a model without) and will have a safety lever on the frame , but it's the best of the bunch, IMO. Trigger is not horrible, at around 6-7 pounds. Magazines hold 10 or 12, depending on the model.
The S&W M&P .22 compact is a different animal entirely, made in the US by S&W, and is scaled down to 87.5% of normal size (Except for the rail).
The slide is made of aluminum (Not zinc alloy), and kinda reminds me of a walther. The lighter slide should be reliable, due to the smaller size. Trigger is 7-8 pounds, and has a more standard 1:15 twist. I think it would be less ammo sensitive than the above models. Some compact model owners say the barrel rifling is spotty on some examples, and as a result, accuracy might not be as good. Don't know, as I don't own one. Magazines hold 10 rounds.
If you already have a CZ75b, there's another option. CZ makes a Kadet kit that comes as a slide and magazine conversion for your CZ75b. Since it's a steel pistol, the slide is a partial arrangement, but it IS a full size slide on a full size pistol, just not all of the slide recoils back. Mine is VERY accurate (IMO the most accurate of the 'combat' .22 models by any manufacturer.) , easy to shoot, and mimics the feel of the 9mm because it is on your CZ75. Mine required a gunsmith to fit the slide to the gun the first time, but after that, it is EZPZ. The downsides to this model is that the .22 magazines are EXPENSIVE. Also, the gun is subject to light strikes with some ammo if your trigger spring is weak on your base gun. A new trigger spring cures that 95%, the early models may need the firing pin updated to a 2nd design, but the new pin works 100%. CZ used to sell the Kadet as a stand alone model, but they discontinued it a few years back.
As an aside, in the 90's Walther was purchased by Umarex, which makes .22 clones of many guns and they are re-labeled and sold under many brand names. They will usually be marked as made by walther somewhere on the gun.
Brands include H&K, Hämmerli, S&W, Colt, and Uzi.
Yes, they also make pellet, BB and airsoft replicas.