I have decided that I am going to buy the 500, I have to save some more money - but the tax cheque I am getting will be safely put away for this lens.
I reckon it will be sooner than later.
I am just love my birding and know that I will put it to great use. I know it will be a lotta of money, but my kids are grown and I am not getting younger.
I thought about the old 500, but think I will see what the new one is like, I have not seen it out yet - I know its going cost heaps, but I rather have this lens than a new car. I am tempted to get the old 500 at times.
The other thing that I like about the new lens, is that it is lighter than the old 500.
edit: jeez, my english is terrible tonight sorry