Hello. I am going to set up a new VPS so it is fresh and up to date with all softwares. Which will be best? Set up a new VPS with new ip adress and copy everything over from the old. And then change from the new ip to the old server have. Or.. Set up a new VPS with new ip adress and copy everything over from the old. And then change the nameserver for the domains to the new ip's. Or can i do it on a better way? I will have so litte downtime as possible. I have full ispconfig, with mail-server, http-server, ftp-server, dns-server.. Thanks!
I'd change the IP - this will have less downtime than changing DNS records because it can take up to a few days until DNS changes propagate over the internet.