Upload & Sell: Off
Not really. I'm more concerned with the filters thing, like I was with the old Sigma.
Based on reviews of the Tokina though, sounds like I might have to get over my filter aversion if I want the best possible lens
I have the Sigma 12-24 mark 1 as you did, I think it's pretty well protected by the built in hood, I've never felt it was vulnerable (and you can put gelatin filters on the rear)
I also think used with care at the right apertures and with LR lens profiles it's very usable indeed, mine gets used for interiors all the time and if you keep it upright it's great. If you don't like that what about a Samyang 14mm?
I also have the 17-40L which, when stopped down a bit is a very good lens, but I don't really regard it as being very wide after using the Sigma.
If you have the funds the new 16-35IS is probably the best bet