hadn't really experienced any HD DVD prior to this. none of the demos around where i live in stores have it setup properly. they all still play SD-DVD's. they say they need licenses for store to demo HD discs aaanyway. so long story short, HTPC+XB360 USB HD DVD player=awesome. i used Chronicles of Riddick as my 1st viewing experience. lemme give you some background: 1. i've seen CoR 2-3 times with friends in some of the best cinemas w/THX&the whole wazoo on huge screens. 2. i've borrowed the SD version of CoR and have seen it for quite a few times on the same system i'm using. now, i hadn't done any upgrades since those experiences with CoR and i have the same exact HT, Denon AVR 884, 7.1 B&W DM300 series with B&W THX Dipoles and so on. i've had this rough setup for at least a few years now. so let me tell you when i watched CoR in HD DVD, my jaws dropped. the reference quality video wasn't the thing that impressed me. i've seen plenty of great 1080p in my time. it was my ears that constantly told me that i had a huge upgrade . the opening was soooooooooooooo crystal clear and smooth. i didn't even know my AVR could decode DD+ 1.5megabits!!! that was awesome! it was BETTER THAN the cinematic audio experience and much better than SD-DVD's "compressed" sound. i can't imagine how much better TrueHD is than this. it was like sonic heaven. i just couldn't believe how good my audio system was. it was like every SD-DVD's audio portion in my collection was just superceded. THIS is the way HT audio should be. man o' man do i have the fever now! this is ROCK'N! i can't wait for hdmi1.3 AVR's that can handle all of the formats. this is truly revolutionary. it really reminds me of the audio from LD days =D. have you all had this revelation? it was like all of your speakers FINALLY opened up and sounded like it does in the cinemas! oh my HT, this is awesome!