Great projector for both gaming and watching movies. Unlike other projectors which are "3D Ready" this one actually is without needed a external 3D processor. I didn't buy a 3D Blu Ray player yet and used my PS3 to test the 3D feature. This projector played 3D games and blu ray films straight out of the box without changing anything in the menu. I bought mine from consignia.ca and their service was great. Even though item came from Canada it arrived with USPS within 3 days.
This is my second projector. Actually its my second 3D projector as well. My first one was a Viewsonic 6210, which was great for the price. These days, w/out HDMI - its hard to watch anything on it though.
The Gt750e impressed me right off the bat with incredible brightness and color. It simply looks great. I like that it comes with the RF transmitter for the 3D glasses. Pretty darn hassle free. The 3D is good, but can be a little dark. They have a few different 3D modes, which I was surprised at how much better some were than the other. Overall, 3D looks impressive.
Important Issues: Optoma GT750E
No optical zoom = pain in the a** to mount on the ceiling. You're gonna cuss a lot when you realize the picture isn't 100% perfect, because there is zero optical zoom and no horizontal keystone. There is a vertical keystone, which is less helpful, but welcome. There's also a digital zoom in and zoom out that I had to end up using to get it to fit to my screen properly. I'm not happy about that because zooming in our out digitally isn't optimal for the best picture...but it looks fine.
Small issues: I have to turn off the internal speaker every time I use the thing. Annoying. There's also only one 'custom' saved setting for picture settings which will get overwritten if you change the settings on one of the presets once. Also annoying.