I am set on one of these two projectors. However, the Z5 is currently priced about 40% higher than the Z4. That price difference would pay for a spare bulb and a projector mount. Is it reallly worth paying the price difference for the Z5? It seems that the biggest difference is an incremental improvement in black levels.

Thanks in advance :)

Do you need 1080p input and extra HDMI input? If not go for the Z4.

At some forum sponsors there is only a $200 difference after $300 rebates. Plus one has a 2 year warranty and a 2 year bulb warranty.