If I was going to get a red dot, I'd get an EOTech. The field of view is far superior to the other more scope-like optics.
If you want to reach out to 200 yards with any accuracy, you've got a decision to make. If you want to be prepared for close shots at any time, then an EOTech with a flip-to-side magnifier will make the most sense. If you don't care about being able to make quick close shots, then just get a decent 1x-4x scope and call it a day. The SWFA 1-4x24 would be the top end of what I would spend ($400), but you can go cheaper if you want for that type of application IMHO.