I don't know if reflex sights fall in your category of "holographic sight" but I own a Burris Fastfire III and its pretty awesome.
Its very small, has a 3 moa dot. I dont know that i have ever seen a 1 or 2 moa dot, but given that mine is a 3 it would be a very very tiny dot.
^these people had the best prices I could find on it. You won't regret it if you get one, its a highly versatile and accurate.