I would wait at least a year or so if I were you. You currently have a really nice projector, and the latest technologies are still evolving. I know it's tough (I'm sitting on my hands too!), but I think the smarter move is to wait until HDMI 1.3 really takes control of the market. On the bright side, a year from now the prices on the models you're looking at now will be way down, and there will probably be something even better for you to buy!
Think about when DVD players first came out. A lot of people spent HUNDREDS of dollars on interlaced ones, only to watch progressive scan players take the market over--and at sub-$100 prices!
Like I said, I know it's difficult to wait, but I think you'll be more satisfied if you wait at least a few more months.