Thanks guys! Regarding a zoom. Well, from a practical point of view, I thought it would be easier than moving towards an easily spooked creature. However, I can see the merits in learning fieldcraft to get closer to your subject, so yes, maybe a prime lens would be worth consideration. Of course, price is also a big consideration I guess. You've convinced me that these are great lenses - so thanks again.
So Many Questions - So Little Time!