Noise performance has nothing to do with how well you shoot. If you are talking about underexposing every image, then fixing it later, that's something else. Your images at ISO 1600 may look like your images at ISO 400, I don't know. I do know, however, that Nikon's ISO 400 performance is unacceptable when compared to Canon's.
Where's Nikon's full frame option? They don't offer one, which is a deal killer right from the start for me. And I'd put a 5D against a D2x any day of the week. Of all the Canon pros I talk to and hang out with, every single one prefers the
files that come from their 5D's to their 1Ds MKIIs. They say the camera feels like garbage compared to the 1Ds, but the files are better. So, I ultimately chose the 5D's over the 1D's.
All of Canon's lenses will work on any of their cameras except for the EF-S series. It's only a handful of lenses to begin with, and in reality only features one attractive lens - the 17-55 f/2.8 IS.
You are right, Canon doesn't have an 85 1.4. They offer a 85 1.8, and an 85 1.2. I fail to see how more choice equals less than. If you want 85 1.4, buy an 85 1.2 and stop it down.
Sure. Autofocus wouldn't work, but you could mount it. But what's the draw in that to someone who is just starting the build a camera/lens system?
What feature was that?
I'm not saying you aren't right, but I will say that of every single pro photographer I hang with, every single one shoots Canon, and every single one shoots with 580Ex flashes, myself included. I have never seen a Metz flash mounted to a Canon body at all the photographer's events I attend.
Isn't image quality paramount? I don't understand what you mean when you say performance and consistency. My cameras perform consistently each and every time I pick them up, which is 4-5 days a week. I will say that Canon shutter life is crap. This is an area I wish they would address, and I've complained to the people at Canon Pro Service.
What everyone needs to understand is, we're all talking about the most intricate details of camera systems. To someone just starting out, these details won't be nearly as important - the focus

will/should be on making great images. The only reason to debate this stuff is because it's fun if you're a gear nerd like me, and it's good to be able to make an informed decision for your purchase.