Yes I've been in the market for a wide-angle full frame lens for some time. It's a tough one for me because I work in a lot of low-light venues, so f/1.4 or f/1.8 primes make a big difference over the f/4 or f/2.8 zooms. But then, with primes I find I'm too far away from the stage (or whatever) and wish I had the versatility of a zoom to get more pixels on the subject. And then I have filters for everything in 77mm so I'd prefer that, and so on.
If it's any help, here's a partial list of options I made. Maybe there's something you haven't looked at. I think they are sorted from high to low price, about $1200 at the top to $400 for the Tokina 17-35, but haven't been that careful with making the list.
Tamron 15-30/2.8 VC
Tamron G2 24-70/2.8
Nikon 12-24/4 G DX
Nikon 24-120/4
Sigma 24-35/2
Nikon 24/1.4 or 35/1.4 or 24-70/2.8G used
Nikon 16-35/4
Nikon 10-24/3.5-4.5 G DX
Nikon 20mm/1.8
Nikon 18-35/3.5-4.5
Tamron 28-300
Tamron 35/1.8
Tokina 16-28/2.8
Nikon 24-85/3.5-4.5
Tokina 17-35/4