I just wanted to let everyone here know that Xpand 105 RF glasses do not work on the Optoma HD25. We tried for 2 hours unsuccessfully to get them to pair to the emitter and its a no go. We have a 3D monitor for work and it took 10 sec for them to pair to it so I am sure it is the Optoma not able to get it done. It really is a shame because they are good glasses and everything I read made it appear they would work with any RF/Bluetooth emitter. Oh well.
I say just pay the extra 20 bucks and get the Optoma glasses. Reviews are good on them and you don't have hassle. The Sainsonic cheap cheap glasses I have heard will work but they are terribly uncomfortable and the picture quality is not as great; probably because they are dimmer.
You can check out my build thread if you want, for calibration, picture quality and everything else I can pull from the Optoma HD25. I just got mine in 2 days ago and watched my first movie last night and it is incredible! Ill post a pic of my room so you can get an idea about the ambient light but I have pretty much full control in the room. At night it is pitch black and even with a light on in the room behind the Theater this thing puts out a stunning picture in Eco Mode, with Dynamic Black off, and Brilliant Color to 1. I went through a quick calibration which I will post the numbers for tomorrow morning with some pictures of movies in action.
I would say unless you have direct sunlight shining into your room, meaning a window or door without curtains, the HD25 is going to be perfect. Even though we didn't get to use the 3D glasses last night we did have the machine in 3D looking at How to Train Your Dragon and I didn't get a sense through the glasses that 3D was going to be too dim in the least in Eco Mode. Of course if I really wanted it brighter I could put it on Active Mode and get there so again the HD25 will be just fine for 3D too IMHO.
I personally love it!