IMO a supressor would be a fun 'toy' for the range or backyard plinking, but not very practical for carry.
I just went through firearms re-cert, so these facts are fresh on my mind.
In a life or death shooting situation, you get a massive dump of adrenaline. That adrenaline rush causes a loss of fine motor skills, narrows your vision down to about 18", and causes your hearing to shut down.
Now, granted I've never been in a shootout, BUT I did experience this once a few years ago when I shot my first deer. All I could see was my target, and I never heard the shot when I dropped the hammer on my .30-30.
Ok, I'm rambling but it looked like they'd already answered the legality question.