I thought about getting one, but then i looked at the disadvantages, the light bulbs are very expensive to replace and if you watch films ect a lot they will go quickly!
Best bet is get a flat screen say 42 inch, it allows you to connect your computer up the flatscreen just like a projector, it does it through the VGA cord. In addition it has loads more ports for digitial cameras, USB's, and more! Its has the same features as a projector but better quality, but bit smaller!