For HTPC applications, you will need a model with the Nvidia ION chipset or similar GPU.
With that config, the lil Zotac box can spit out 1080p
NVidia ION is a great chipset for HD video playback. Might be a bit of an overkill for an * box -- If you have an apple and I have an apple and we exchange these apples then you and I will still each have one apple. But if you have an idea and I have an idea and we exchange these ideas, then each of us will have two ideas. George Bernard Shaw