I'd like to stay around $1000 to $1200. I would like 16gb ram and at least 512gb storage. I don't know anything about graphics so I have no idea what to look for. I've been looking through Apple's refurbished models but there isn't much with 16gb ram. Do I really need that? There are a bunch of mac mini's under a grand with 8bg ram but I have no idea what the other specs mean. Any help would be great.