I have a 3251 and with HD it makes a beautiful picture, with HD DVD even more beautiful. The hard part is watching SD tv...looks so horrible.
I know that didnt help, but I am very happy with the 51. I bet the money saved could get you something real cool too.
PS when/if you do get it, play with the energy savings, I found I like mine best off or low, which should help bulb life as well.