The Glock 19 is the Original, every other polymer gun is trying to be a Glock
This comment is the same as saying every Assault rifle is trying to be an AK, every SMG is trying to be the Thompson, or every Anti-armor rocket is trying to be a Bazooka. It's simply not true. There is a diversity of design despite the fact that form follows function. Glock made a polymer gun, which was more affordable, has fewer parts, and has incredible reliability, compared to say, a 1911 (not knocking, just saying. I like 1911's).
As far as polymer frame, the japanese basicly began the plastic car revolution. In 1975, less than 20% of cars had plastic bodies (haven't checked that, but how many 1975 plastics have you seen?) Now, less than 20% of cars have metal bodies. Point is, with the plasics evolving and embedding themselves further into our lives, it was only a matter of time before someone made a successful polymer frame gun. Remove Glock from history and there would have been someone else.
S&W has developed a polymer frame gun that is extremely well recieved by almost everyone who has fired one. This should be commended, and anyone that has the opportunity should try one, rather than sticking to brand only.
I'm interested in finding out what the original poster went with and how he likes it, since it's been almost 4 months since the post.