Now you're talkin', Klaus! 
I wonder if I should sell my 24/1.4L II for this and pocket the difference?
However, there's one thing I'd like to point out (apart from a typo on the second page: "Typical for most ultra fast primesm the Sigma shows..."):
"Thus this is good enough for close-ups where the emphasis is on the center anyway but for low-light shots of a wider scene, this isn't so hot really." <-- I'm afraid that short of the (nonexistent) wide angle Otus, you're SOL if you want this (and even the hypothetical Otus might have a good deal of trouble here). Especially on a high-resolution sensor like this. Are you by chance going to do a comparison test at 21MP, or is the 5D Mark II as good as dead now?
I wonder if I should sell my 24/1.4L II for this and pocket the difference?However, there's one thing I'd like to point out (apart from a typo on the second page: "Typical for most ultra fast primesm the Sigma shows..."):
"Thus this is good enough for close-ups where the emphasis is on the center anyway but for low-light shots of a wider scene, this isn't so hot really." <-- I'm afraid that short of the (nonexistent) wide angle Otus, you're SOL if you want this (and even the hypothetical Otus might have a good deal of trouble here). Especially on a high-resolution sensor like this. Are you by chance going to do a comparison test at 21MP, or is the 5D Mark II as good as dead now?