Thanks.
I doubt I can do a fair comparison between the 2 setup because the D800E definitely outclass my 5DII where resolution is concerned. I've not taken similar photos using both setup for comparison. The TS-E 17mm was wonderful for what it does and there's no equivalent. You do get a little deterioration in IQ when the lens is shifted to the extreme but its not a big deal to me. Here's a photo taken with the TS-E 17mm + 5DII.
However, with the Chinatown photo, I felt that the Distagon 18mm was not as good as I thought it would be. Looks a little soft on the edges but that could be due to lack of local contrast in the buildings. I should be able to get a better idea as I use the lens more. I am definitely getting a little colour fringing with this lens though. You can see it along the edges of the lift shafts at both ends.
I bought that 18mm as a compact alternative to my 14-24mm because there are times when I just don't want to carry that much stuff around. Stay tuned for more photos