Ok so most of the brands you mentioned: Boss, Chanel, Armani etc are what would be defined as fashion watches. Personally I don’t think they have the same clout as an IWC, Omega, Panerai, Bell & Ross etc.
As such, I wouldn’t buy one as your essentially paying over the odds for a relatively simple cheap watch mechanism with the word Chanel (or whatever) written on it.
If you’ve got the money to do it then by all means by a proper watch from a respected watch manufacturer. There definitely over priced trinkets, but if you buy wisely then it’ll last forever. I have an Omega my parents bought me for my 21st that looks as good now as it did when I got it 13 years ago… Its been worn everyday, been all over the world and I’ve come to rely on it.