Lovely set of shots Tom!
I'm going to have a look around at the
second hand market - no way I can go for new at the moment unfortunately
Nikon & Sigma both have good reviews but is it worth looking at the older Nikon 70-200 f2.8 D???
The older Nikon 80-200 2.8 AF-D's came in two versions. I think it's generally the newer of the two that is most highly regarded, mainly for its improved focussing speed, though both offer optics as good as anything else avaialble even today. I've no idea how to identify newer from older but I'm sure somebody else can.
There is also a fairly rare Nikon 80-200 2.8 AF-S which is meant to be the bee's knees but used values are so close to a 70-200 VR1, I can't quite see the point in it nowadays.
Sigma have offered quite a big range of 70-200 2.8's. I think that generally speaking the best regarded, probably in this order are 70-200 2.8 HSM OS, 70-200 2.8 HSM II and 70-200 HSM, the OS being the best and most expensive accordingly.
For what it's worth I absolutely agree that a 70-200 (or 80-200) would suit you down to the ground, at a price of course.
My own experience is with first, a Sigma 70-200 HSM II and now a Nikon 70-200 VR1. The Sigma was a superb lens, fast focusing, sharp and surprisingly compact. I bought the Nikon on a whim as it came up at a great price. The Nikon is better in my opinion, sharpness is similar but VR is helpful and I think the Nikon offer noticeably better contrast. On the downside, it cost me twice the price of the Sigma, is so much bigger that I had to buy a new bag and it also weighs more. I love it but I do sometimes question whether I'd have been better keeping the Sigma and a pocket full of change.