Here's their call.
It's not as loud as roosters and you should be fine noise-wise as long as you don't have really grumpy neighbours. Also they don't do it in the middle of the night like roosters do.
Just give them a nice large space to roam around, closed in of course. I'm guessing you know they fly.
Also, would you get mature birds or young ones? Young birds are cheaper but you have to wait a year or two before they can breed (and fully colour up).
You can keep them in pairs or trios. Without enough females or space, males housed together will fight.
And you know how to tell if a golden is pure or a lady amherst hybrid?
And yes, getting unrelated pairs is important. I have a pair of goldens, I had only intended to get the male but the guy I got them off offered me a female he didn't want for free (she has an egg-eating problem). I can't breed them though because they are siblings (also the male picks on his sister like a typical brother). We are getting a girlfriend for him soon because he is desperate and makes his pheasant call daily (maybe even hourly).
I think that's it. I have only gotten mine fairly recently (April), but I do all the research I can do on them. Sorry if this is a lot, I just love them and love to talk about them. They are my favourite pheasant species.
When are you getting them?