you should start doing some in depth research before you buy.
Aimpoint and Eotech are two of the most recognizable names and are definitely quality, but there are other less expensive options that will still give you a quality optic. stuff like Burris and Vortex sights will come in at lower price points and i've heard they are good sights, and if you feel adventurous, looking at eastern european optics might get you something you'll like for a cheaper price too.
as far as those Russian/Belorussian optics go, they are a lot of nice options for less money, with the only caveat that, while cheaper, they are usually a bit rougher and less full featured. they are however usually built like tanks, which is great, because i'd imagine getting yor warranty work done is a pain in the ass.
but shop around, you might find something you like that will suit your needs, if you arent dead set on an aimpoint or something.