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Liberty wrote: Beretta is good example of this. I was initially disappointed when the P92 I purchased last year had some plastic parts. The guide rod, trigger, and grips are plastic. While most of us don't mind a plastic side grip. I was concerned about plastic guide rod. Turns out that there haven't many problems with what looks like flimsy plastic and that it may actually make a more accurate and reliable gun because of the self lubricating nature.

I honestly had the same experience with with my 24/7 Pro. I bought it partially because it had a polymer body and thus lighter, more durable and more ergonomic, but i was less than thrilled that the guide rod was plastic. Since that time I've never encountered a single problem due to the guide rod being plastic.

cheaper
good to go right out of the box
don't rust (well, less of a rust worry than a 1911 anyway)
lighter
more rounds
more durable
feels MUCH better in the hand (shooting a 1911 feels like shooting a 2x4)


cons:
because they are lighter you generally have more felt recoil.
it'll take some time switching from 1911 trigger pull over plastic guns with a pivot trigger

in short, your plastic guns are great for daily carry and would rather have one of those for concealment and capacity reasons over a 1911 any day. 1911's are pretty and they shoot great when they're tweaked, but when the rubber hits the road I want a modern gun in my hand.

If you want something closer to a 1911 in size and function but in a poly body look at the Taurus 24/7 OSS. There are some similar features there.

http://www.taurususa.com/products/gunse ... series=OSS