The EH330 also has a couple of different options for you when it comes to sound. You can use the onboard 2w speakers, or you can plug in external speakers via the 3.5mm jack.
As this is a lamp projector, the lifespan of the lamp isn't what you'd get from a similarly priced LED projector, such as the Pico Genie M550 Plus. Whereas the M550 Plus gives you up to 30,000 hours of projection, the EH330's lamp will need replacing after only 5-8,000 hours. This is still mighty impressive for a lamp-based projector at this price however!
It also lacks a number of the Pico Genie M550 Plus' other features, such as battery backup, Android OS and short throw projection, so if you want a portable projector that can do it all, the M550 Plus may be worth a look. If you're looking for a simple, high-brightness and high-quality projector though, the Optoma offers tremendous value considering the high lumens and resolution.