The retail version of the WinTV-HVR-2250 includes an IR remote and IR blaster. The (cheaper) OEM version does not.
The Hauppauge HD PVR or Colossus card do not tune OTA. They are meant for recording from HD digital boxes and are way over budget. They are also much more difficult to use and are less reliable than a WinTV-HVR-2250. If picture quality for recording from a DVR is not a big issue, the WinTV-HVR-2250 is a much better choice.