Tokina 11-16 f/2.8 OR Tamron 17-50 f/2.8?

I really need help deciding what lens i should get!
I often find myself in 'tight' and 'crowded' situations and my 24-85 f/2.8-4 isn't helping much (especially cause it doesn't have a fixed aperature).

here is a list of the lenses in my bag:
Sigma 70-200mm f2.8
Nikkor 24-85mm f/2.8-4D IF
Nikkor 50mm 1.4

is the 11-16 range too limiting?

Tokina.nice and wide, sharper, better reviews.
If you got the 17-50, you'd end up wishing you'd gone a little wider.
By no means a walk around lens, but you have one of those.