Re: D2X and the 17-35 AF-S f/2.8 ED-IF lens vs DX
Adams, I've also had the AF-S 17-35mm f/2.8 and used it both on a Nikon D100, D2h and D2x. The Lens is really meant to go for war. It's absolutely solid (I always shoot adventure sports in rough conditions) auto-focus is really fast, It's almost wide enough with a DX sized sensor and one os the things I love about this lens in any camera combination is the closest focusing distance witch is really close.
The worst problem with this lens is Chromatic Aberration which is not really bad wide open but is there, although completely manageable, especially with Photoshop CS2 as with it you can correct for aberration in Nefs via Camera RAW, or scanned film or Jpgs with the lens correction filter.
The combo of this lens with a D2x, unless you need something wider is an indestructible, fast, responsive and heavy piece of equipment... Don't worry about DX whatever, the 12-24mm is so much weaker and fragile compared to this lens that if wide angle isn't an issue, I'd definitely go for this one. You should also check for the 17-55mm which I still hadn't a chance to try out but seams to be a good compromise...