Frustrating, but in the scheme of things...

I have finally decided to bite the bullet and purchase a new NAS. I purchased a ReadyNAS Pro Business 5+ years ago and it's still running, although the fans start spinning at over 2K rpm more often than they used to. I've been told that this might be a sign that it's on its last legs. I contacted Netgear about it and they said it was out of warranty and I was on my own. As disappointing as that was, I understand it. I did get 5+ good years with the product and it is still running: Not bad for much of today's technology.

Frustrating: Today I went to Netgear's online chat to ask some questions about the 516 and after being in the queue for 23 minutes, going from number 11 to number 2, I was told that "There are no agents available to chat with you right now. Please try again later." When I clicked on the button labeled "Request Email Response" it took me nowhere.

I'm still hopeful that I can get these answers here while I compare the ReadyNAS 516 to the Synology. I've not heard very good things about the Synology support people either, by the way. (In fact, I can't believe the vitriol of some of the people posting about their experiences with Synology support.)

Questions:

1. Does the ReadyNAS still come with a 5-year warranty?
2. Can I use my old ReadyNAS Pro Business for backup as a ReadyNAS Replicate unit?
3. Will the ReadyNAS 516 permit me to have dual redundancy? I think that's RAID6 with two redundant drives?
4. If I use ReadyNAS Remote how secure is the connection? Is the data sent between machines encrypted? If not, will it work while I use a VPN?

Thanks in advance for your help.