I started with the 75B Mil, and my second CZ was the 97B. I've gone through several 9mm CZs over the years, but I still have that first 97B. I've had three 1911s as well, but my stock 97B is the most accurate handgun I have ever owned, with the possible exception of a S&W PC/Heritage Series Model 15.
Oddly enough, I once had an FEG GKK .45 that was fairly comparable before the metal fatigue set in. It was a piece of pot metal, so the mystique of .45 ACP must have some basis in fact...
The plastic baseplate actually makes the magazines easier to manipulate and index with your off-hand, in my experience.
Ammunition expense is a much bigger factor than it was when I started out roughly 13-14 years ago. (9mm factory ammo was roughly 10 cents per cartridge back then, and it was even cheaper when purchased in bulk.) If money is an issue (when isn't it?), I would suggest buying a 75B first for that reason alone. Otherwise, I prefer the 97B, all things considered.