I have a few. Eotech, OKO and Tasco Optima.
You know how much Eotechs are so I'll move on to the others.
The OKO is a well made red dot optic made in the Czech Republic. Costs about $175.00 new. I bought mine used here on the EE for $100.00. It has 11 brightness settings. Mine is a 4moa dot, they are also available with an 8moa dot. Great battery life, no automatic shutoff as far as I know. Holds zero and takes abuse pretty damn well. Exceeds my standards for quality, I am very happy with it.
The Tasco Optima 2000 is a micro red dot site. About the size of a matchbox. Tasco discontinued this model but it is now available as the Docter Optic sight and the J-Point. New, they are $175.00 on the EE, used are a little bit less. Online retail is over $200.00 for the J-point. Over $300.00 for the Docter, so the new ones on the EE right now are a great bargain IMHO. My optima is the 3.5moa dot version. The optima is also available in 7moa (I think). The J-point is available in 4moa and 8moa, the Docter is available in 3.5moa and 7moa.
Both of these sights are very well made and perform well. BUT it's just my opinion.
The Bushnell holosight is supposedly just a civilian version of the Eotech. Supposedly not as bulletproof or tough as the military spec Eotech. I don't know though as I do not have a Bushnell holosight.
One red dot sight that I do have that works fine on an AK is the Kobra. Russian made. I have a first generation model. Adjustable reticles. It has held up well so far, about five years, but I do tend to baby my rifles and not get too tactical. They do make a version for flattop AR's but I have no experience with it. I have read some good and bad about Russian optics. Caveat emptor.
If you can afford it, get the Eotech. Second would be the OKO.
I have used the Bushnell Trophy (30mm) and the Tasco Pro Point (1") on other rifles. They work fine but just don't look quite right on an AR. I do like the adjustable reticles though. And they are inexpensive.