Thanks for the comparisons, they are very interesting.
As far as lens comparisons, I would love to see:
* DA 18-135 WR - very popular lens being a kit option and having Weather Resistance
* Sigma 18-35 (when its available) - a much discussed lens
* DA 20-40 Limited
* Sigma 17-70 (A) - a popular lens choice give focal range - but is it better than the DA 18-135?