Les:
Probably a little of both. Actually it seems to depend on the source and equipment. I am running either a non-HDTV signal or DVD through a quadscan, using the projectors RGB port, through the projectors component and svideo directly or through an HTPC,using a Radeon VE card, through the RGB port. Unfortunately I have yet to find a DVI cable and do not have access to HDTV. We are a little behind up here in Canada. I would expect that the latter two sources would be superior to the results I am currently finding. Never hurts to test a product through the most adverse conditions. Things can only go up from there.
Calibration also makes a difference re. screen door/graininess.
I will try to post pics of all of the sources and you can decide for yourself.
So far I have reached one conclusion. The XP30 has a much better internal scaler than the PLV60. In fact, if I purchase this projector I will be selling the quadscan.
Brian