Congrats.
My first CZ purchase is a 75B Omega ( found a good deal too, but not quite as good as yours). The mags drop free in mine. There is a mag guide (piece of spring steel in the mag well between the hammer strut and the mag well) that can be or have a mag break in some models, but I don't know if they have that feature in the Omegas.
I plan on doing some re-springing to help with my trigger pull, but I recommend that you shoot the pistol a bit before you decide if you want to change anything with the reset. I found I was doing unintentional double taps because I was riding the reset on my first outing with mine. I have found it to be pretty easy to wring some accuracy out of even in stock form.