HTPC software?

[Dusty Chalk]

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.