Do you think a f/2.8 WITHOUT VR is a better option than the 80-400
VR for my needs? Or is 70-200VR 2.8 best, 80-400VR second and
80-200 2.8 or the Sigma 70-200 2.8 third?
If you're wanting to do a lot of portrait shooting, I don't think
the 80-400 would work well for that, Sverre. I used it a lot for
candids and it works well in that environment, with decent
lighting, but I wouldn't choose it for normal portrait work. It's
1.3 stops slower than the other listed lenses, at 80mm, plus it
probably has a longer minimum focus distance, than any of the
others. If you're willing to work at 20ft or so from your subject,
the MFD wouldn't be an issue, but you still don't have the lens
speed.
The 70-200vr is probably the most versatile for portraits, unless
you're willing to work with support all the time. Using support and
flash/fill flash, the 80-200 or the Sigma 70-200 would work fine.
AFAIK, the Nikkors have a slight edge for color and contrast over
the Sigma, but they should, because they cost more.
So, really, it comes down to how much you want to spend and how
much emphasis you put on rather subjective things such as bokeh,
color and contrast and AF speed.
--
my gallery of so-so photos
http://www.pbase.com/kerrypierce/root