Unfortunately Zotac is not forthcoming with the power brick specs they include in their bare bones little Blue Ray boxes. I am thinking that 90 watts ought to be plenty as these are basically just like laptops without the screens, and most of those in this category have a 50-70 watt adapter.
Cool thanks for the help,
Have ordered a FUSION350-A-E and am going to run a picopsu so that it gives the greatest flexibility for any future changes.
Designing the case now so that it matches my hifi system, hoping to use a single 92mm Nexus fan above the heatsink and draw the air in past the hard drives and tv card. Will post up some images before I laser cut it to see what you think.