Anyone here doing a Microsoft-based HTPC?  Just curious what software you choose and why?  Choices seem to be (from Engadget poll): 
 
ArcSoft TotalMedia Theater 
Corel WinDVD 9 
PowerDVD 8 Ultra 
SlySoft AnyDVD HD 
 
Blu-Ray is a must, and HD-DVD would be nice, though I don't expect to use it (I have the capability, don't intend to track down the software, but if I see some for cheap and have the ability, why not?). 
 
Yes, I can google, and have, and will some more, but wouldn't mind hearing from the peanut gallery.