Welcome to GT.
If you are just looking for opinions, I'd like to get a 10mm Glock but it is down my list so hasn't happened yet. Got the 26 for a concealed carry gun, and the 17 for a range gun. Both of those in 9mm.
I already have revolvers in .44mag and .357mag for hunting.
For your first handgun you may want a less powerful caliber to get the hang of it and do a lot of target shooting, no?
I joined the NRA, have you yet?