Over the years I have worked my way through several 85-ish mm lenses from various manufacturers
My first one (back in the early 70's) was the Canon FL 1.8/85mm, quite an exotic lens in those days, but by 'modern' standards obviously heavily outdated lens due to the (again by modern standards) inferior coating and lens design. But I really love the image rendering of that lens, even after 40+ years.
I switched to Nikon in the late 70's (really the only pro's alternative in those days, not so much for the sake of the brand, but more so because of the dealer and repair network, availability of third party accessories, and offerings on the second hand market ) when I started my studies at the art academy in The Hague.
Being told it was the 'best' my first portrait lens was the 2.5/105mm, but never felt the 'magic' of that lens, so after some time traded it in for a 2/85mm AI. Found that one handy as a low light short telelens alternative (compared to my 4.5/80-200 Ai and 4.5/300mm AI ED), but didn't impress me very much either.
After that had a long spell where I basically never used short tele's like a 85mm but rather long telelenses (between 200 and 500mm) for my fashion work. Last couple of years though started looking into the 85mm range again, especially for the use in portraiture (also due to the fact I basically am quite content with my present DF and D800, and now find I have some money left to spend on 'luxury' lenses).
As I wanted to experiment with tilting the focal/sharpness plane (similar to eg a large format camera) I initially got a 2.8/85mm TC (never grew to like it due to the awkward handling) and later a LensBaby Composer with 80mm Edge. Didn't work out for me (too fiddly to work with, and imagewise too sharp and too clean), so decided to approach it in a more 'traditional' way by simply using shallow DoF, and moving away from the holy grail of 'perfect sharpness'.
So no I've started a small collection of 85mm lenses, ranging from a Lomography Petzval 2.2/85mm, a pre Ai Nikkor-C 1.8/85mm, 1.8/85mm AF D to a 1.4/85mm AF D.
The Petzval is an acquired taste (love the typical bokeh, although for some that's an absolute horror), which BTW is despite many reports claiming the contrary is quite capable of delivering sharp images despite the ancient design and awkward pin and rack focusing system
http://www.pbase.com/paul_k/image/156848896/large.
The Nikkor-C 1.8/85mm has the typical soft (un)sharpness of film age lenses, much like the 1.8/AF D, although the latter being more of a workhorse then an 'artistic' 85mm.
Had the opportunity to play around and compare with the 1.4/85 AF S and 1.4/85mm AF D (which I own). Found the differences in sharpness and AF speed for real life/my personal use use neglectable (not much of a pixelpeeper, and coming from a manual focus background not having unrealistic expectations of what the AF should be able to do/how much it should be able to compensate my operating errors).
The 1.4/85mm AF D has an amazing ultra thin DoF image rendering wide open at and around 1.4
http://www.pbase.com/paul_k/image/145046624. But it completely changes character when stopped down (only) a few stops
http://www.pbase.com/paul_k/image/163023739 delivering eye watering sharpness and detail.
So unless you really are after the latest and 'sharpest' IMO hold on to your cash and 'just' get a 1.4/85mm AF D.