Jaff, agree and that's where this thread started, there are some good options available
The 70-300VR is certainly an excellent lens for walkabout shooting, it's what I use most of the time and although it's not got real pull it is excellent for a broad range of subjects. It really depends what Karpman wants to gain from the upgrade and the intended shooting conditions - for long-distance shooting on reservoirs it's not going to be much of an upgrade, but if the intent is to do lots of handheld walkabout shooting and birds in flight then the VR and AF-S will really be a boon there and the lens is, I understand, a fair improvement optically over the ED that Karpman has now.
Jaff's idea isn't the worst I've seen,
Neil