WEll you have to be more carefull with such a lens , specially in decaying buildings ...
As far as i saw there's a system to put filters on the Nikon 14-24, which makes it interesting again.
[link]But for TSE lenses ... canon definitely has the best choice of it ... and their 16-35mm is really good too.
true the size and weight of a D3X or D3 is unbelievable, but than i usually only carry 2 lenses with me when exploraing something ...