i've got the vivitar brand of the 85mm f1,4, and it's great especially for the price. mine isn't for the x-mount, however.Crispy sharp Bob.
I've been using a Nikon 100E and the F60 2.4. Both are great but I yearn for something in the middle and a bit faster.
I think I'm going to give the Samyang 85mm a shot as soon as the budget allows.
And I wouldn't mind an AF Fujinon 85mm 1.8.