Jeff, I have both the 2000 and 4000 and would definitely suggest the 2000, unless you really feel the need to tinker. Bottom line is wind velocity and temp for 90% of the LR shooting we do since we always shoot at the same locations. Also check the new Bruntons, they just changed the name and shape and are much smaller than the Kestrals. Sounds like those son's of yours know how to buy old Dad a decent Christmas present! I am sure that your family is getting excited about the upcoming Christmas.