MediaPortal...
It's a little better than AverTV and WMC...Just takes a little time to setup and it will use whatever codec pack you want...or select for it...it's very easy to use once you get used to it and if you have an Android or Iphone it works terrific with Unified Remote over your network or BlueTooth
http://www.team-mediaportal.com/
It will also let you choose the channel order and makes it easy to connect online for a TV guide...
Oh it will let you scan cable and air and combine signals anyway you want...