Beretta 92FS three dot vs M9 two dot sights

[APV]

I am considering Beretta 92FS or M9. I have stopped by the local store and checked both models. Target acquisition seems to be faster with two dot sights, but for some reason most of handguns I see have three dot sights. Is there any disadvantage of the two dot sight vs popular three dot sight?
Is there any difference in quality between Italian made and US made models such as 92FS, M9, M9A1 from practical experience?

[TeeMan]

Personally I like the two dot sights better: they're less "busy" and quicker to acquire. I think the divots in the sights are the same on both guns, though, so with a little paint you can set either one up the way you like.

[sholling]

I like the 3-dot M9A1.