There are only a few minor differences between the 735 and 736 models, the 736 has a front HDMI input, it allows for adjustment of the tint on all the 6 colors of the color wheel, whereas the 735 can only adjust each color, not the tint, and it also has net command. The 788 is the diamond series model and it has a nicer cabinet, 120 hz. and all the features of the 736, but I think that's about it. I have the WD-73733 which is last years equivalent of this years 735, the only differnce I can tell between the two is the styling of the cabinet, I don't think anything else has changed. I love my 73" mits. and it's still the best value in a tv as far as inches per dollar goes. The only drawback of DLP to a flat panel is that with a DLP you have to replace the bulb every so often, but seeing as how you cant get a flat panel in a 73", you just can't beat it.