The V-Neck and the Half-Zip

I have never been a fan of the v-neck sweater as a layering piece.  The wide neck opening makes it difficult for the shirt underneath to remain in place and has the undesirable effect of stretching out the neck of the oxford shirt.  Consider this picture:

This is the inevitable result of layering a v-neck sweater over an on oxford shirt.  It is surprising, therefore, why so few men consider the half-zip sweater as an alternative to the v-neck.  It is, I suppose, typically heavier, which would make it difficult to layer with a sportcoat.  But sportcoats are not always necessary.  Just consider the difference with the half-zip sweater:

The half-zip sweater has a much cleaner look when it is layered with an oxford shirt.  The neck of the oxford is more likely to remain in place, and the opening of the sweater can always be adjusted.  The v-neck does, however, have one advantage over the half-zip: it works quite well on its own:

The fact that the v-neck works well on its own, and the half-zip does not, proves, I think, that the half-zip is a superior alternative to the v-neck sweater as a layering piece.