Re: Give the gold to Silva
It's sort of counter-intuitive, but it would seem to me that hitter friendly parks demand better defenses, and pitcher's parks allow for worse defense. A "free" baserunner is more likely to turn in a run GABP than nearly anywhere else in baseball whereas a "free' baserunner in Pecto is still likely to be stranded.
Given that outs are at more of a premium in hitter's parks (because they are naturally less frequent), having a defense that creates more of them is significant advantage.
Games are won on run differential -- scoring more than your opponent. Runs are runs, scored or prevented they all count the same. Worry about scoring more and allowing fewer, not which positions contribute to which side of the equation or how "consistent" you are at your current level of performance.