I may have about £500-£550 around xmas to get a dslr and long lons as possible, I had a short list that due to money has come down basically to a Nikon D7000 with the most budget available zoom going to 400mm that I have seen second hand is the Tokina 80-400 D.
I used to have a Nikon D7100 with a AF-S 70-300VR and at the moment am re editing my aviation pics from it, I am plesently supprised how good this set up was, this is what has led to me asking the question as My budget will be extremely tight and a one off occasion with no opption to save any more money.
I had considered Canon but tbh not the 7D as the one I had I just did not take to, the 80D I mentioned not to buy as its well out of my budget metioned, I know the 60D is near to my budget if I look hard on Ebay(might be a bit rough round the edges if cheap), then I know the only Canon 400mm zoom the mk1 100-400 would be out of my budget.
So not many opptions due to the budget and my requirements - Light weight, 400mm lens with less need for cropping, or a 300mm lens but on a larger Mp body allowing more cropping to reach the 400mm lens length.
I know £500-550 doesn't leave a lot of wiggle room.
Finally got it right I think - Nikon D7500, Nikon 300 F4 PF, Nikon 1.4 X mk3 TC