I am real happy with my 4.5-14X40, 30 mm tube, SF, VX3i's. Relatively compact with the 40mm objective and lighter weight. I usually set them at 4.5X and appreciate a smaller sized scope and lower mounting while maneuvering around rocks, trees, & brush (don't like top heavy rifles). The 14X is enough for small rodents at more than 400 so shooting at elks would work out well. The price of these 4.5-14X40's 300 mm tube SF is much less than a 30mm tube 3-18 X42 SF. The 3-18 would be a fine scope for my .22-.250 which is my general all purpose rifle, real tiny targets can be seen better at long range with 18X. The smaller exit pupil of a 40mm objective 14X scope does not seem like much of a handicap compared to a 50 mm objective lens 14X scope.