Sig P320 in 9mm.
Or some of the Glock or Glock clones. The hardest thing oyu have right now is finding one to buy.
Best advice...if there is anything you've wanted to have, get that. No regrets.
CZ has great line up, but I did not like the Shadow 2. Sig is really good, and reliable. P320 versatility is hard to beat. Turkish imports are good quality. Better to get something local, so you can get some hands on. Or at least know what you are getting before you buy online.
One factor to consider, is what do you want to do for Mods? Optic? Porting etc.
Keep those factors in mind when making your selection.
Revolvers are a lot of fun, but ammo is expensive.
Most importantly, enjoy the process, and have fun.