Has anyone here had a chance to compare HD against a good upconverting DVD player on a 720p display ?

For someone with an 1080p display going to HD now seems like a no-brainer -- we're past the initial teething problems and HD DVD prices are coming in line with regular DVDs.

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8