VDPAU hardware decoding doesn’t support Hi10P.
Don’t buy underpowered crap that depends on hardware decoding, or toys like the PS3 which don’t even support old and widespread formats. Currently, anything with two cores that doesn’t say Atom or Celeron on it can handle typical anime encodes no matter how crappy your media player setup is, but I’d suggest getting something more beefy that you won’t regret buying two years down the road.
tl;dr- Stay the fuck away from hardware decoding
- Get a graphics card with decent drivers (that unfortunately leaves AMD and Intel out of the question)
- Get a CPU that could handle possible future formats
And in case your budget is too tight for that: Get a job already.