I read some of the threads on AVS as well. Most likely I won't spend the money. My plan is to use the Z2 as long as possible, maybe until my first bulb blows. Then at that point I could sell it, explaining to the buyer that it just needs a new $200 bulb.
To be honest the thing has very low hours on it for as long as I have had it...
Once the 1080p projectors come down in price that will be my next step. The only thing is I don't think my anamorphic lens will work with the 1080p movies.