Hope everyone is doing well

I'm going to upgrade from my beautiful/reliable ZZR-250 to something else probably in the 600's range.
I don't have my mind set on any bike yet but i'm quiet sure it's definitely going to be a Kawi

The options that i know about are :
Er-6n,Er-6f, zzr600 or maybe even a ZX6-R..
My budget will be around 8000-8500
I commute to work everyday and in any weather so i need something reliable i guess ...
Any suggestions please?