Nikon 10-24 f/3.5-4.5 - how good is its quality?

So for awhile now, I've been debating on whether I should buy the Nikkor 10-24 mm f/3.5-4.5 DX lens, or the Tokina 11-16 mm f/2.8 lens, and I decided that I'd want the zoom feature of the nikkor more than that of the Tokina.

BUT: I've heard Tokina is really high quality.
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So, quality is now the deciding factor: How good is the quality of the Nikon 10-24? Is it completely crisp? Do the edges blur out? And if so, is it noticeable? How well do the colors come out? Are they generally nice, bright and distinct colors? Or not? How does its quality compare to that of other lenses, and specifically the Tokina, if you know about it?

Oh and minor last thought: Being at 3.5 (or 4.5) aperture for the Nikkor, how fast can the shutter speed be at ISO 100-200 in a: bright day, in a well-lit room, in a somewhat-lit room, at midday, at evening light. Just very generalized ones, I just want an idea to think of how I'm missing out with the higher f-stop.

The Tokina 11-16mm f/2, 8 has a better construction, in term of sharpness it's above the 10-24 from nikon and the f/2, 8 aperture can be use at 16mm, this will obviously give you an edge for inside photography over the Nikon 10-24 who use an f/3, 5-4, 5 aperture.

For exposure value you can look at this chart.
http://en.wikipedia.org/...sure_value

11-16 samples

10-24 samples

I struggled with the same question and ended up with the Tokina 11-16mm.

There's hardly any noticeable difference between the 10mm of the Nikon and the 11mm of the Tokina; about 4%. Check the differences here: http://www.althephoto.com/lenses/superwide.php

Another way to look at it is to take a 8x10 photo and trim 1/4" from each edge; right/left/top/bottom. What you are left with is what 11mm vs 10mm would compare to (other than the smaller photo - which you can disregard for this example). Not a lot of difference.

And you probably already have a kit lens that bottoms out at 18mm, so the 24mm end of the Nikon is overlap, especially since you are probably buying the super-wide for the low end.

The Tokina is a constant f/2.8 along the entire zoom length, which is 2/3 to 1 1/3 stop better than the Nikon.

The Tokina is generally regarded as a superior lens in almost every way; build quality, corner sharpness, and even price. The only downside to the Tokina is if you have an entry-level Nikon; D3000/D3100, D5000/D5100, D40, D60, etc. You can't autofocus the lens as it is an AF style lens without it's own focus motor. An advanced amateur camera; D70, D80, D90, D700, D300s, etc. Will focus the lens.

There are tons of reviews on YouTube about the Tokina, and some even compare the Nikon 10-24:

The other issue with the Tokina 11-16 is that the demand is so high, some retailers can't keep them in stock.

Nikkor is also Nikon so it should be good. Tokina however is Pentax so it's better.