I think Sharp has a solid contender on their hands with this model, but...at $4500 MSRP, it is a full $1000 more expensive than JVC's new RS45! The RS-45, which was shown at CEDIA and will be available in November has a 3-chip D-ILA engine as opposed to a single chip DLP (with color wheel and associated "rainbow" effect). It also sports motorized horizontal and vertical lens shift and motorized 2x zoom lens (with memory settings!), which gives you much more flexibility in installation. Based on the performance of the current model, the RS-40, I would say that the JVC will have a much better picture and better features at a lower price.
Sharp will have to aggressively price the XVZ-17000 if they hope to compete with the new crop of projectors coming out!