This may not be what you want to hear, but hey ...

Na ni na ni boo boo.
You don't need it. It's a great deal today. But by the time you have kids or are okay with filming your porn or have a valid reason for purchasing it, the technology will be passe and/or the price will be lower.
It's a cool toy but you don't really want or need it. Take the $500 and invest it instead. Buy the toy later, when you'll use it.