I currently have a Trijicon Reflex II with the 12.5 moa triangle on my MP-5. It has worked very well for me so far. I have not had a problem yet with the "washout" that a number of people have reported with the Reflex. I have not tried it yet under sodium vapor streetlights, however. I have noticed that the triangle is hard to pick up when going from a bright environment (brightly lit room or sunshine) to a dark room. That may be caused by my lousy eyesight, age, the Trijicon sight, or a combination of all of these.
I have been toying with the idea of replacing the Reflex with either an Aimpoint or an EOTech. I think either of them would be faster for CQB than the Reflex, and since my engagement ranges would almost certainly be 50 yds or less, that is the most important issue for me. I have an Aimpoint Comp M2 on my Bushy, and I have been very impressed with it. I have zero experience with the EOTech, but the concept looks very interesting, and a lot of people with more experience with these optics than I have speak very highly of it.