Personally I went in another direction as I'm not security minded in the same way as you, but my service provider recommends a router/streaming unit called AirTies.

While I'm not sure it will cover all your needs, check it out.

As far as backups etc. again I haven't even tried it, but hear good things about Acronis True Image.

BTW while you have no need to change from Win XP. I had a very strangely pleasant change from XP to Win7. And it at least has BitLocker.. again something I don't use.

I even leave my WiFi open to neighbors which need speed.