
I'll just add a few things if you dont mind (I'm assuming you are new, no offence either)

I'm new myself and like most things you'll get people who 'need' the latest and greatest. It's the nature of forums particularly IMO.
Things like the size and weight should be considered....I'd 'like' a 70-200 2.8, but for the cost, the weight, the attention (seriously).....will it produce better pics than my 55-200? Yes, but only sometimes - side by side no doubt, but would the size of it terrify the kids, resulting in less natural pics? Would I even take it out on average day, would I worry about dropping it/getting it stolen? (ok, there is insurance, I know) That sort of thing.... it's just one 'part' of getting a photo you are happy with (an important one though).
What about composition, understanding light (natural as well as flash etc) a bit better? Tripod work? It's a huge subject. IMO you'll get more out of that for the next while than forking out a 4 figure sum out and getting 'sometimes' better pics?:shrug:
I'm still new myself and soemtimes surprised at the stuff I can get from my bog standard d3000 and £100 55-200.
I know you are going to come back now and say you have 30 years experience and 10k to spend

Just my thoughts anyway

I think i'm just saying it's easy to spend a fortune in this game without any guarantees of quality returned.