Try all three and find out which one you shoot best. This matters more than anything else. I owned the CZ75B first then got a G19 later and currently prefer the G19... let me run you down the pros and cons as I see them.
CZ75B Advantages
- DA/SA with Safety, let's you experience different trigger pulls and actions which is an advantage from a collection standpoint.
- "Better" trigger (I like the G19's better, but that's just me).
- "Better" grip (again, the G19 fits my hand better and shoots better
for me, but generally people like the CZ's grip).
- Cadet .22LR Kit with target sights lets you smooth out the trigger as you practice with cheap .22LRs... I have to say this is my favorite .22LR semi (even against purpose-built ones like the P22, MKIII, or Buckmark), few- if any- conversion kits are as good.
- Aftermarket magazines less expensive & more reliable than Glock mags
- Exchangeable grip panels.
- Sexy rounded edges and slide-in-frame design.
- Col. Cooper's recommendation... a SA with "double-strike" ability.
G19 Advantages
- Consistent trigger
- Better factory sights (CZ sights are tiny)
- More easily maintained, the CZ is no slouch with a polycoat finish, but the G19's polygonal barrel, super-easy field strip, and low parts-count give it an edge in this category.
- Accessory rail (doesn't help me but if I'm mentioning things like grip panels for the CZ...)
- Lighter & more durable, you can
always cram the G19
somewhere into your range bag to give it some practice time.
- Greater slide surface to grip.
- KISS philosophy that's very zen...
Both are accurate, reliable (zero G19 failures, CZ premature slide-lock that was operator error), low bore axis, and a good value for your money. You can't go wrong with either
except to buy without trying first. At
least in your hand, but even better actually shooting them (many Glock converts are due to how it handles while fired, I know I was).
For me, it came down to two main things... I shoot the G19 better (which would be enough on its own to prefer it) and I'm more comfortable cleaning (or
not cleaning) the G19 than I am leaving the CZ75 dirty. Maybe that's just psychology (since the CZ75 has passed some pretty wicked torture testing itself) but it translates into more range time for the G19 for me.