I currently have a few red dot sights. I wont comment on durability, since none of my gear gets abused. Here's a breakdown:
Vortex Sparc- Fairly heavy, crisp dot, decent brightness, mediocre battery life, annoyingly mushy push button controls, 6 oclock led position less than ideal, extra mounts are a big plus, 2x magnifier almost useless, excellent warranty.
Eotech 512- Big, heavy, decent brightness, poorly designed battery setup, great reticle (maybe the best), weak battery life. Of all these red dots, this is the only one that has needed warranty work. The battery terminals broke loose..., sold the replacement.)
BSA 40mm- Pure trash/garbage. Enough said.
Tasco 40mm- ^^
Aimpoint PRO- Excellent optic. Have nothing bad to say about it, but its not really competing with these other sights so I wont go into further detail.
Bushnell TRS-25- Crisp bright dot, clear optics, lightweight, great battery life, nice solid click adjustments, mounts low enough to cowitness on AK rail, works very well for $100.
Aimpoint H1 2moa- What can I say, its the best. Amazing battery life (50,000 hours), crisp dot, brightness goes up to nuclear (seriously, Ive never used it above setting 9), price is insane unless its on sale (I paid $445 OTD for mine). All that said, I was somewhat disappointed that the clicks on the Aimpoints adjustments were not as positive as the Bushnell micro's. I can compare these 2 side by side and there are few differences. Aimpoint is brighter/clearer and I can bet my life on it. The Bushnell is almost as good in every respect (that matters), but I know its not something I could drop from a helicopter and still function, which the Aimpoint will.
If I had to rate them, it would go like this:
1. Aimpoint
2. Bushnell TRS
3. Vortex Sparc
11. Eotech 512 (Haha, I'm not a fan of any failure prone $380 optic)