The *new* chrome bumper will not be as thick or as nice.
The reproduction ones are known to be shaped wrong, made thinner and sometimes the bolt holes do not line up, in addition to the chrome not being very thick, so it rusts fairly quickly.
If you buy a truck that is a base model, with most things painted... then, you can simply repair and repaint.
It all depends on how fancy you want to get. The thing is tho', lots of people want to get fancy, so they have original used painted pieces to get rid of.
So, if you want more of a truck than a car, that is something to consider.
-W