My brother and I went to the range yesteday to compare some dot sights. Well... we didn't go meaning to do a comparison it just kind of worked out that way. Sorry... no pics.
I'm right handed and left eye dominant. I like the EOTech 512 best because it's easy for me to use with both eyes open. The small center dot (1MOA) helps my accuracy for longer shots. The ring around the dot makes it easy to aquire so I don't have to search for the small dot. The ring is also helpfull in judging how much hold over to use. And it uses easy to find AA batteries. I don't care for the placement of the on/off controls though, it can be a little ackward to set brightness if you have a flip up rear BUIS. Make sure to get the Rev. F, it has rubber covered controls. $350.00 is a good price.
The Aimpoint M2x2 is good also though. The on/off control is better. It has 2x magnification and is NV compatible. It is also easy to use with both eyes open and I don't really notice the 2x unless I close one eye then it is like "instant zoom", pretty cool really. If it had a ring around the dot like the EOTech it would probably be my favorite. But with the smaller FOV I understand why they didn't put a ring around the dot. For some reason my eyes make the small 2MOA dot look like a small "starburst" which hurts my accuracy a little. The battery is a 3 volt lithium 1/3N and not as easy to find as AA batteries, but I can buy an extended battery cap that would let me put 2 batteries in at a time. It is more expensive than an EOtech 512 though. I got lucky and found this one on ebay at a good price, it's not a ML2, it's a M2. $400.00+ for the 1X, $500.00+ for the 2X.
The C-More Railway is a pretty cool sight too. NV compatible and the dot doesn't "starburst" on me like the others do which is nice. You can change out the diode to change the size of the dot to your liking. You can buy 2MOA to 16MOA diodes and swap them out, that is a very cool feature. But it is a little fragile looking and the brightness control makes me have to put my off hand in front of the dot to adjust it. And I wish the sight adjustment screws had "clicks" instead of just a smooth turn to them. It uses a 3 volt lithium 1/3N battery. It's a little over priced in my opinion, but still a good sight, I'm glad I bought it. About $270.00.