These are just my opinions on a few different guns
S&W sigma is a decent gun, good DA trigger, but I didn't really like it for overall shootability. I had an older model, maybe they've improved them.
Taurus millenium, is a very nice shooting gun for what its meant to be. The 24/7 are supposed to have the same trigger mechanism. Its loooong, but smooth.
My beretta 96, is one of the most ACCURATE pistol I have ever shot. Its wild how good this gun is.
Springfield XD's are sweet guns with an excellent trigger.
A nice slick 1911 can sometimes be found at a good deal used.
I have no comment about glocks I have very little experience with them.