I have a pair of S&W 3000's. One is blued with the folding stock, 18.5in bbl. with a front bead. The other is parkerized, also with a folding stock, 20in. bbl, rifle sights, and +2 extension.
The 18.5" model is my favorite; it's handy, light, responsive, and has a snap-on Hi-Viz red...