I play Xbox on my Marquee 8500 all the time (original xbox mind you, not 360). I connect the xbox to my Onkyo receiver and from that I run an RCA to my DVDO iScan progressive scan interface which is connected to my 8500. I'm not sure what resolution the Xbox outputs with the regular A/V cables but I'm guessing its probably 480i or something. If I were to get the HD cables for the Xbox and run those directly to the iScan, would I get a significantly better picture?
hell yes my xbox is modded! i never stopped to think about that HD cable until i was browsing xbox accessories on ebay the other day, which brings me to my next question. there are a bunch of cheap-o off-brand xbox hd cables on ebay, does it matter what brand i get? will the cheap knockoffs work as well as the Monster or Microsoft branded cables?
I don't know enough about the 8500 that you have, but the original XBox only have Component HD output; Microsoft never came out with an RGB cable. So, if you Marquee only accepts RGB, you have to use a reverse transcoder.
Any accessory for the XBox that outputs RGB (as far as I know) basically become cheap transcoder from component to RGB. If someone can tell me I'm wrong, I'd be happy .
That X2VGA transcoder will transcode the component output to 1080p for *games*. But DVD / HD-DVD content is limited to 480p over component. For 1080i/p DVDs you need to pull your RGB off the VGA connector.
Have a look at the xbox360 web site - the cables are listed. As klover suggests, use the MS VGA cable to give you RGBHV on a standard D-type connector which can then be broken out into coaxial cables to your PJ.
The 8500 should be happy with the video timings from the XBOX. I usually shove things into a dektop CRT monitor first just to check everything is sensible.