There must be something wrong with my eyes because I can't see owning a gun with a plastic handle. I not only like the look of nice wood but also the feel of it. A few scratches and dings add character. The small loss of accuracy is of no concern to me as I use my rifles for deer and plinking, an 1/2" off at 100 yards isn't going to ruin my day.
If I lived in an area where long range shooting at varmints was common or was into benchrest shooting, then I would probably opt for the plastic.

On the other hand, if you aren't going to spend the extra money for a nice wood stock but opt for the mossberg level barn lumber for a stock, then it makes much more sense to get a synthetic.