If you're talking about wide angle f1.4 lenses, the only lens you can get with that budget is a 30/1.4 from Sigma, but being a DC lens, it's designed to be a 50mm equivalent.
IMO, your next best option is the Sigma 20/1.8 lens at about 500+ new.
If you're ok with stretching your budget, you may purchase either the 24/1.4L or the 35/1.4L at about 1.5-1.8k 2nd hand on this forum.