http://www.larue.com/larue-tactical-mbt-2s-trigger

I wonder how soon they'll ship. Picked up an extra

I don't know but at almost 50%, it's a no brainer imho

For plinking at 25 yards iron sights or 100 yards scoped, how much value does this offer? My stock s&w trigger has no slack, is a little heavy but breaks with a clean snap. What applications would a trigger like this shine?

Every application. I don't have this trigger on my gun (yet) but I have played with some high end triggers before. It just feels better in every way.