awk help needed

Hi.
I am trying to write a script that will parse my /etc/passwd file and return a list of all non system users. (All UID's above 500)
I am using awk to isolate the usernames and uid's like this:

awk 'BEGIN { FS = ":" } ; { print $1, $3 }' /etc/passwd > /tmp/usrlist

And it works fine but of course it still lists all system users as well. Is there a way to get awk to process the list even further so that only users with a UID > 500 is output?

Thanks

awk 'BEGIN { FS = ":" } ; $3 > 500 { print $1, $3 }' /etc/passwd > /tmp/usrlist