To make sure you get that full 7mm exit pupil on 14x remember you must have a 98mm objective - 4.5-14x100 is the new paradigm.
Between the 6x42 and the 3.5-10x40 I would go with the 6x42. However, if there is a reasonable chance of shooting game at < 25 yds. get the 3.5-10x40 because you can't focus the 6x42 that close at factory parallax settings.
