Dustin, not trying to hijack your thread, honest! I just want to reply to Pedro, and elaborate a bit.
Pedro, thanks very much! I do like Photozone a lot. I presume you own the Tokina?
Photozone's review convinced me to try the (Cosina) Voigtlander 58mm f/1.4 (Nikon mount), about a year and a half ago. I bought a Canon adapter, and couldn't be happier (the adaptor's fit is of lesser quality but I made it work). I seriously think it is the sharpest 50mm lens in existence, although it has very noticeable longitudinal CA (bokeh fringing) at the wider f/stop end (which would likely count against its ultimate sharpness for many...not so much for me because I see what I see at 100% on the screen). Lateral CA is minimal, however.
I just can't believe how sharp it is on my crop camera. I believe it's significantly sharper than the 85 f/1.2L toward the wider end (I rented one once), and falls to almost as sharp by f/5.6 (which is saying something). It retains the sharpness to the extreme corners...wide open (again, on my crop camera). The Voigtlander also has no vignetting on the crop camera, wide open (I'm sure it has some on a full frame). By stark contrast, the 85 f1/.2, had very severe vignetting wider than f/2, on my crop camera. The adapter has a focus-confirm chip, it lights up my AF, and not only does it work...but it's as accurate as it could be (a lot more accurate than my eye/viewfinder interface is).
The fit, feel, and metal finish, seem close if not identical to Zeiss. Zeiss are also made in Japan now, or at least the ones I've rented are (most of you probably know this, just stating it for clarification).
I have no idea if it is as sharp as the new Canon 24-70 f/2.8 ii zoom, at 50mm. (The Voigtlander is spec'd at 58mm, but in reality I think it's more like 54mm. It also effectively magnifies the image a lot at the closest focus distance, so it's more like a 65mm up close.) One thing is certain: No one in the world would ever test and compare them, and even if they did, they would never admit the Voigtlander has similar sharpness. (I mention the Canon zoom because recently it has been tested to exceed the sharpness of the Zeiss 50mm f/2 Makro Planar...which previously was supposedly the sharpest 50mm lens.) If this Voigtlander had Canon's name on it and a red stripe, then maybe it would get compared in an honest way.
As for the bokeh, no it isn't perfect, a bit far from it. But it's also quite good...a bit of the ring-highlight effect, not all that noticable usually. It wouldn't compare to the 50 mm f/1.2L, but then, what does? Certainly the 50 1.2 is about as sharp as a baby's bottom...as in...it's soft.