I'm starting the process of building a Windows Media Center HTPC. I've grown frustrated with the limitations of my .. um... modified.. tivo and am looking to take this to the next level. Having played with a friend's Media Center PC, I was blown away at what it can do (I'm open to other software suggestions if they have all the same features as WMC. Cost isn't an issue since I have a copy of WMC already)). I don't have HD (but have Digital Cable, if that matters), and all the guides seem to be geared in the HD direction. Anyone have a good resource for non-HD HTPC guides/part costs? I am not looking to build a top of the line machine.. just one that will do the job well.