One of the most effective flash hiders on the market is the YHM 5C series. Either the smooth front 5C1 or the jagged-edged 5C2. Performance is identical. About $25-$30 from most vendors. Consistently ranked in the top group of flash hiders in independent tests, but way cheaper.
For a duty grade home defense red dot there are lots of choices, depending on what features you think most important. After experimenting with various options, I finally settled on Leupold's Deltapoint Pro mini reflex. It has a much larger viewing area than Aimpoint micros. It is rugged. It is protected by spring steel hood, is motion-activated (meaning years of battery life under typical use). The lens is virtually tintless. It has no knobs, dials, battery compartments or other obstructions to interfere with peripheral vision around the optic, and still weighs only 1.9 ounces excluding the mount. With the riser and cross-slot mount, it weighs about 4.5 ounces.
Now that it's been on the market for several years, prices are coming down from its initial $600, almost $700-$750 with mount, to about half that price. I now have two. One is the primary optic on my hd carbine (absolute cowitness height with FSB and folding rear. The other is 45 degree offset from a mid-powered mil/mil tactical scope on my precision Recce build.
Here is the home defense setup.
Field of view looks like this: