From what I have seen and heard the Wilson and Kurt's Custom brakes look sweet and aren't too loud. My main reason for installing them is looks also. Ever since I can remember, the M-16/AR-15 has been protecting this country. After 25 years of seeing something attached to the end of that muzzle....they just look so weird without something there. It's like a man without a head, fish without gills, a bull elk without antlers.......or an arab man without a beard! Just odd looking.
At any rate they can help keep the muzzle more level during rapid fire, not that a .223 recoils that much anyway. But it does make a noticeable difference. It also protects the tip of your muzzle should the weapon be dropped or something. Have it installed. I would.