I finally broke down and bought all the major parts I need to start building a HTPC for our HDTV. This is something I have been meaning to do for some time but was waiting for all pieces I needed to come out. I plan on using the HTPC for HD/Standard video playback, games, emulators, music, photos, etc. For the curious here is a list of the parts I have purchased so far.
Abit AN8 Motherboard
Athlon64 3000+ CPU
BFG 6600GT PCI Express Video Card with HDTV Out
1Gig DDR400/3200 RAM (2x512)
The rest of the parts are going to be left overs from old computers that I'll slowly replace. I did not purchase a capture card as I plan to keep using the TiVo for ease of use. Living in a rural area we only get CBS-HD reliably so I'm still debating on getting a HD capture card.
I plan on purchasing an XMystique sound card with Dolby Digital Live Real-Time encoding which outputs DTS-ES, DD-EX 6.1/7.1, DD 5.1 and DTS 5.1 over S/PDIF and coaxial outputs. I'm still debating on the remote but right now I'm leaning towards the ATI Remote Wonder II RF. For game inputs I have a USB to PS adaptor that I plan on using wireless Logitech controllers with. I have a wireless keyboard but I have yet decided what to do about a mouse for gaming. I'm left handed so finding comfortable mouse is a little harder since over half of them out there are designed for the right handed.
I would like to run a Linux distro with MythTV on the box but it looks like I'm going to have to go with XP Pro or XP MCE for compatability and games.