Lucid M7
Primary Arms Holosun Micro Red Dot
And about two dozen others, mostly coming out of the same Chinese plant making Eotech and Aimpoint parts. Basically, you get what you pay for in terms of quality. Visually, there are a lot of dots, reticles, etc., on the market, some have a variety of colors and switch from one to another.
Basically, you get the scope type, or the square view reflex, it can be more a matter of taste than any directly superior function. I boils down to having a red dot that you can see in full daylight. That also goes to the lens size, smaller optics tend to constrict the view. Maybe automatic intensity control to prevent flaring in low light, a battery you can find available to purchase, and battery life that is accommodating. Most are. The mount may - or may not - be included. If the optic doesn't include the mount, add $40 - $80 more for it's installed price to make a valid comparison. Many don't and that can be a budget buster. A recreational shooter doesn't need a tactical double throw lever scope mount with co witness and other bells and whistles if it costs as much as the optic itself. There is really nothing morally wrong with having the mount included in the construction of the optic. Despite all the chest thumping.
I avoid large format expensive batteries, or button cells, and pick one with AAA power as you can find them and use a rechargeable, to boot. Get it with the mount included, as that cuts the cost substantially. Auto light adjustment is a nice to have if out shooting on a day where it's sunny one minute and dark clouds the next, which isn't uncommon in hunting or moving from outdoors to indoors in home defense. Much after that - pick the one that you like the looks of. If you have to force yourself to choose it against your sense of taste, you won't enjoy it. Let the optic prove to you whether you made a good decision. If it doesn't work out so well, then you have reasons why and what to look for in the next one a few years down the road - when they will be offering a better version yet again.
That said, I own a first generation Aimpoint with base adjustments, runs a size N battery which is nearly impossible to find locally, and which has 8 hour run time. And, it's still a wonderful red dot. And still, I've been shopping for what I described above, while using scopes and a reflex which hasn't proven to be any problem.
