If you'd still prefer plastic, give the Walther P99 in 9mm a try. This gun remains one of the smoothest shooting 9mm pistols I've ever shot. I have a .40 P99, buddy has the 9mm. I love my .40, BUT, there's something about that 9mm.
If I had to pick one word to describe it, it would be "butter".
-stunks
P.S. if you've never tried one, try it! It sounds corny, but there's just something about the way it feels when it's fired. The action is unbelieveably smooth and crisp, hard to describe.