Hi,
The 5803 will convert any composite or s/vid signal to component but will maintain it's 480 rez.
This is what I did so it's value to you should basicaly give you an option.
I have a multidisc dvd-a as well as a mltidisc sacd.
They are both also dvds but are only used for video if my main player can't handle a certain disc.
Aside from all the analog cables I've used for each, I also attached a coax or opt to each for digital input designation which are vcr 1 & vcr 2 and also align each with EXT 1 & 2 accordingly. On top of that for a 6th ch I lop THX ULTRA II music mode onto each. Then I take out my SPL Meter & tweak the EXT inputs.
Pehaps I'm doing it all wrong but it seems to work for me.
BTW If anyone withe the RC-8000 remote kit can point me to where I can dnld the (from scratch codes) I'd appreciate it.
Peter M.