With the imminent release of the Xbox360, there's alot of questions on HDTV flying around here. Here's a few links to some accurate information (or at least opinions that are at least backed up w/ facts) that will get you started:HDTV BackgroundSamsung's Excellent Interactive HDTV GuidePhAnToMrAhL's Beginners Lesson in HD ThreadNielo TM's HDTV Buying GuideDeathwish238's Surround Sound Buying Guide10 HDTV Myths (thanks, Ironhide Delta!)Major Nelson's Interview with Tyler, MS's HDTV ExpertBuying an HDTVHow Stuff Work's Guide to buying an HDTVExtremeTech's TV Buying Guide and follow upCnet's TV Buying GuideNote - You do NOT need a TV with a built-in or external Digital/ATSC tuner to play Xbox or Xbox360 in HD. Any HDTV or HD-Ready TV will do. All you need are the Component Cables (or VGA Cables w/ Xbox360).The ATSC, Aspect Ratios, Signals, and CablesWhat is the ATSC?The Digital Bits Widescreen-o-Rama (all about aspect ratios)DVI vs. HDMI vs. Component Cables (reprint, can't find original article)Alvy Ray Smith's DTV Page (720p vs. 1080i) (his bio)Calibrating your TVEngadget's Viewing Distance vs. Resolution Chart1080i v 1080p from Geoff Morrison (Home Theater Magazine) (explains why having "true" 1080p does not matter for DVD/HD-DVD output, and that it really only matters for games running above 30fps)x
I'll be updating this periodically, so check back once in a while.