I do the same exact thing when I shoot my ak pistol. I'll warn the people next to me. I like when people give me a heads up but at the same time I realize we are in a shooting range so some guns will be loud.
I finally got to hold the carbine model recently and I really liked it, I'm trying to convince myself I don't need one haha. If I see an amazing deal it might be something I have to acquire.
^What he said, I have the Trijicon sights on my 17 and I love the big front sight. For me at least the acquisition is very quick and its super bright haha.
I recently read this guys reviews on the TA31, TA11, and TA33. It's pretty good write up, If I had to pick it would be the TA11 seems to be most ideal for all around stuff.
http://www.firearmreviews.net/acog-comparison/