The EX9200 Pro seems like a great option for most general uses. Not only does the projector strike a balance between a good feature set and portability, but image quality is great, and the price represents a great value proposition.
Thanks to the Epson EX9200 Pro's 3200 lumen bulb, the picture is bright enough for most rooms, and color reproduction is fantastic. Presentations and documents look crisp, and video is looks pretty great as well.
Connectivity options are also fantastic on the EX9200 Pro. The ports included on the back of the projector should fit most people's needs, and WiFi connectivity is a superb option that helps set Epson's offering apart from a number of competing projectors.
Finally, the projector's size and weight are an ideal middle ground, allowing fairly easy portability along with a form factor that will also fit right into a permanent setup.
There's really only one minor negative point to touch on with the EX9200 Pro. The audio situation is a little disappointing considering the projector does so well in every other area. The included speaker will do well for most presentation purposes, but anything involving heavy media consumption could be better served by a more robust setup. Unfortunately, without any audio out options, this is a hard one to get around. There are certainly accessories, like HDMI audio extractors, that could ease this problem, but setting these up may not be worth the trouble.
At $799, the EX9200 Pro represents a fantastic balance between price and features. Picture quality certainly measures up to more expensive projectors, and is great for presentations and documents. The BenQ HT4050 most likely beats Epson's offering out for video content, thanks to its impressive color reproduction, but it's also quite a bit more expensive and much less portable.
In the end, however, if you're looking for a projector that performs exceptionally well for presentations, is fairly portable, and doesn't break the bank, Epson's EX9200 Pro is definitely worth a look.