Limited 3D. The PG-LX2000 can support 3D over both analog and digital connections, but it's limited to working with computers with a quad buffered graphics card, at 800x600 and 1024x768 resolution. As a practical matter, however, the more important limitation, as with most 3D-capable data projectors, is that you have to buy enough pairs of DLP-Link glasses for your audience. Prices are slowly falling, but the glasses are still $70 or more each in most cases. For a $550 projector, that means spending more on just 8 pairs of glasses than on the projector itself.
Low-quality, low-volume audio. As with the sound systems in most light-weight projectors, the PG-LX2000's audio isn't very useful. The 2 watt mono speaker suffers from enough of a bottom-of-the-barrel echo effect to make the quality no better than fair, and it's not loud enough to fill even a small conference room or classroom. If you need audio, plan on using an external sound system.
Also hurting the projector on this score is the relatively loud fan noise, rated at 37 dB in Normal mode and 32 dB in Eco mode. In my tests, the fan was loudest right after turning on the projector, and then quieted down a bit. Even after it quieted down, however, I found it loud enough to make it hard to ignore from three feet away when looking at data images. When I added sound for my video tests, the noise didn't get any louder, but it went from noticeable to annoying. Even if you're not sensitive to fan noise, you may consider this a problem.
Although the fan noise may be an issue for those who are sensitive to noise, particularly if they have to sit near the projector, the PG-LX2000 scores well on most basics, including the core features that matter most.
The projector delivers excellent data image quality, better than average video quality for the 1024x768 native resolution, and reasonably high brightness, along with settings that will let you adjust the brightness for different lighting conditions and image sizes. It's a little stingy on connectors, but it has all the ports you need, and the HDMI port takes it a little beyond the absolute minimum.
Also helping is that the PG-LX2000 is not only cheap to buy, but it keeps the total cost of ownership down with a reasonably long lamp life and a low cost for replacement lamps. With all this working for the projector, there's a lot here to like. And it adds up to making the Sharp PG-LX2000 a more than reasonable choice, particularly if you're on a tight budget.