Was at Shriro and just saw the new DA 17-70. Size wise it is just a tad bigger than the DA 16-45mm. Unlike the DA 16-45, the lens barrel extends when zoomed to the long end. It has a pretty solid feel and the zoom is very smooth. The focus throw is much shorter than the DA 16-45 even though both have the same 0.28m minimum focusing distance. Definitely a very versatile zoom range.
Fengwei, you should test the DA 17-70 against the DA 16-45 if you can.
Curious to know how much this lens will retail.