HDMI has no transfer to PC, AFAIK, watch DRM.
Component can be encoded by Hauppage (sp?) for PC or Elgato for Mac, unknown quality. OTA ATSC is cheaper.
Composite or RF can be encoded by more brands but limited to 480i or possibly 480p. Watch MacroVision.
It is too bad Dish will not output ATSC for HD recording on TiVo (boo) and a lot more now for remote TVs.
-Ken