There are differences between a reflex sight and a holographic sight (Eotech).
Red Dot Sights / Reflex Sights & Holosights Explained should explain some of these differences.
That said... I am in the minority here because I see absolutely nothing wrong with getting a cheap reflex sight or a cheap red dot to see how you like it. They run in the neighborhood of $30 and will work fine on a low-recoil weapon. You might see them losing zero frequently, or you might not. You might like it well enough to justify the expense of something ten times as expensive, or you might not.
Arguments you will find against it:
Why would you put a cheap optic on an expensive rifle?
- Because I spent all my money on the rifle, and I'm not sure I'll like this type of sight.
I wouldn't trust my life with a cheap optic, would you?
- No, but then again, I don't live in a war zone. I DO trust my iron sights if it comes down to needing it.