Hi I'm thinking of an upgrade to my Toppy 5800 but had a few questions I was hoping existing owners might be able to help with. 1. 500 Gb or 1 Tb? Do I really need the extra space? 2. Network ability. When networked can I store recordings on a HD on a Pc and then play them back through the Humax? Or is this not possible/not a good idea? 3. If the above is possible do I need a USB drive for transferring files around or is this not needed? I ran a few TAPS on the Toppy but ideally want a PVR that works fine out of the box. Any help or words of encouragement much appreciated!