If you think you will never have use for higher resolutions than 1280x1024 then the price of this unit and picture quality still might make it a good choice.
The VPL-TX7 was completely capable of excepting just about all the sources you could think of, but did not include the ability to computer free presentations with a USB drive. However since most will ceiling mount this projector, I can't see that being a feature most will need. Just keep it in mind if you are planning to use the projector as a mobile unit.
The projector is however network ready and if you do permanently install it, you can control the projectors critical functions via a web browser and even check the projectors status.