I have a CZ 75BD which is going to be my suppressor host, CZ 455 and just got a CZ 912.
As far as CZ grips go, look at Nill Griffe or Hakan. Hakan is what most find to be "The Best". You can send him molds and he'll make you the grips. I went with the Griffe grips myself.
Dry fire and get to the range a lot to get that trigger broken in. It's very gritty to start.
Meprolight night sights are my suggestion for night sights but there are a lot of different routes you can go. Check czcustom.com and the CZ webstore.
CZ factory mags are some of the best out there but they are pricey, MecGar is the only other brand I would look at when you do mag shopping.
Pick up whatever brass ammo you want, I haven't found anything yet that has trouble feeding, PMC, CCI, American Eagle, S&B.
Take a look at Gun Vault