[Rover]

I'm not sure the difference in DOF is going to be of major significance. I was perusing the Sigma 85/1.4 test on TDP once and there's an excellent rollover comparison tool. I couldn't honestly call the difference between f/1.2 and f/1.8 shots noticeable, let alone between f/1.2 and f/1.4 shots (before you ask, that comparison also included a series of samples from Canon 85/1.2L II). I always felt that f/1.2 mattered more on film where you couldn't just ramp up the ISO, and now Canon has such lenses mostly for bragging rights (like the 50mm f/1.0 back in the day).

http://www.the-digital-picture.com/Compa...rture.aspx