RLA,
I accept that a native-480-line projector's pic will look better than a native-720-line projector's pic with a 480P source, but how 'bout comparing to my 50" 4:3 RPTV? Do you think the SP5000's pic projected to, say, about 60" diagonal (4:3) will look as good as my RPTV will look (at 50", of course)?
And there's the issue of future compatibility. I'd expect the native-720-line SP5000's pic will look better with a 720-line source than a native-480-line projector's pic. Do you agree?
Decisions...decisions...