I just got a different router and it supports a bunch of different security measures. I've been reading up on their pros/cons on wiki so I have a rough idea of the differences between the options. I just want something that provides some measure of safety but isn't too difficult to get working (or fix in the event that something resets when I'm not home, this is my parents house).

The options available for my router are:

WEP (which I guess you shouldn't really use anymore), 802.1x and RADIUS (this seems promising?), WPA-PSK, WPA, WPA2-PSK(AES), WPA2-AES, WPA-PSK/WPA2-PSK, WPA1/WPA2.

That's the list copied from the router's config page. Any suggestions?