^ This. Also, look into a used Canon EF 16-35mm f/4L IS USM with the adapter. Its legendary for edge-to-edge sharpness and should easily fit your budg...
Like someone mentioned, switching to the digital interface is basically mandatory if you want to dodge that hiss. I remember a wedding at a windy lake...
My buddy told me the exact same thing last week. Guess he was right lol.
You can set price drop alert at WhenPriceDrop.com. They will alert you when price drops: