But your flash is capable of HSS, right?
Actually, what I really meant was you do not need our permission to get what you like.

If there is something you really like, why not. There is no such things if something is worth or not. Different people have different priorities. I saw people drive expensive Mercedes, BMW and live in a apartment. And a friend of mine who live in a house (4 levels including basement) that has a elevator inside his home only drive a old Ford Explorer he do not think those expensive cars worth the cost. And one time, a multimillionaire asked his consultant (someone I know in person) where he could buy a used printer, so the consultant bought a new printer, used it and sold it to him at a lower cost to make him feel better.
If you really think you need it, go for it. If not, stay with what you already have. If you ask me if D700 or D3 are better camera, I can say yes, is it worth to pay that much, at this moment, my answer is no. But of course, other people will say yes. So does it really matter what other people think? If you did enough research and know what you really need, there is no reason to ask whether you should upgrade. Just go with your heart.
If that you make you feel better ... yes, please upgrade to D7000. See .. it doesn't mean anything. Hope you understand what I mean.