It's interesting that price was mentioned, regarding Canon. I just did a rough price comparison of a D3X with 2.8 zoom lenses (shooting people and editorial, a necessity as well as a visual style choice) from 14 to 200mm for the Nikon and 17-200 for the Canon, plus the fastest 85mm portrait lens they have (all priced non imports at B+H) and the Canon came in at $13,210 and the Nikon at $14,630. Quite a difference. The Canon would have been even cheaper, but the Canon 85mm 1.2 was $1870 versus the Nikon 85mm 1.4D at $1230. That was of course with the Mk III at $7G and the D3X at $8G
(if you're interested, that was choosing in the Canon line up - all L series 2.8's - 16-35 ; 24-70 ; 70-200 (plus the 85 1.2) / Nikon line up - all G ED 2.8's - 14-24 ; 24-70 ; 70-200 (plus the 85 1.4)).
In 35mm I've been always been a Nikon user and I much prefer their hand feel to the Canons, plus the SB on camera flash units are unbeatable, but with things like NX software (way too slow for any high volume pro application) and having to pay for Camera Control Pro just to tether the camera, it might be time to jump ship.
The Nikon 70-200 lens is another major issue. Why release a camera like the D3X and not have a pro 70-200 2.8 available for it? I've used it with the D2X and it was fabulous, but I've heard horrible things about it on the full frame sensor.
So, if I'm going to go Canon and want to stick with 2.8 or faster (which I do) for zooms, would there be any other lenses I should look at apart from the L series 16-35 ; 24-70 ; 70-200?
Thanks for your help guys. Much appreciated!