Well, been thinking about it for a while - today, bit the bullet. A choice between a new Darth Sumo Emperor or the lens, the lens won.
Nikon 24-70 f2.8
cost me a fortune, but I think I'll recover
I tend to do portraits and street photography and after much review reading, decided it was the one for me
very very fast focus, crisp images,
a real pro lens, but in a real amateur's hands