Check out projectorreviews for the Mits review vs the Runco. The Mits has better motion apparently, as Runco has no frame interpolation. I would expect the Sony 95 to be equal to or better than the Mits on motion.
I own the Sony 95 and haven't seen the other 2, but note the Sony 95 is widely praised for having good motion handling due to its faster panels, and is a strong all around performer, with good color and so forth out of the box with just a few setting adjustments. The Mits might be cheaper than the Sony however, but probably suffers from an earlier generation 3d mode.