I am looking at either upgrading the HTPC I have now (recycled full ATX tower: needs coax input, HDMI output, Blu Ray) or buying new. Beforehand, I need clarification on how this will work with my digital cable box. What I am looking to do (without spending $400 on a Ceton CableCARD Tuner) is to use my HTPC as a DVR where I completely rely on the WMC guide and recorded TV and never have to switch inputs to the cable box. I am finding it very difficult to find any clarification on how a regular tuner card works as far as bringing the content over from the cable box. Does it simply bring over the video from the channel the box is set to? And does a regular tuner card have the ability to watch one channel and record another like a standard DVR?