Wouter Willemse , Sep 30, 2009; 11:06 a.m.
Amateur, so cost sensitive...never earned a dime with my pictures :-)
The 80-200 f/2.8 nikkor. In fact, I've got one, bought new some 3 years ago. The claimed "slow AF" of this lens isn't all that bad, I use it on a D300 nowadays, and I find very little problems with AF. The quality it delivers is great, from f/2.8 on. Build quality is good.
When I bought it, the only other alternative was the Sigma 70-200 f/2.8 HSM version II. I tried that too, on despite the HSM, I found it slower to focus (esp. to acquire initial focus, tested on a D80), and not so sharp at f/2.8. The Tamron wasn't out yet at the time, but when I'd go now, I'd still have the Nikon on the top of my list. Too much reports that the Tamron is very slow to AF (but I'd still try in the store!).