I built a HTPC last Autumn using Windows 7. First I tried media center but soon tried Media Portal for its configurability. I was advised against XBMC as I have a TV tuner and I want to use my HTPC as a PVR. However MP was too complicated and I couldn't get the tv channels to change fast enough unlike in MC. I have since moved back to W7MC but I miss the configurability that MP offered. I am now looking again at XBMC and note you can use it as a PVR if you use a back end tuner. So my question is does XBMC work very well as a PVR if I were to use say 4TR as a backed tuner and importantly can I pause live TV and rewind live TV as I could in MP? I prefer to use a different tuner server to MP as I found the tv took an age to turn on and change channels using MP. What are your thoughts?