I have narrowed it down to the final Two.
Tamron 10-24 f3.5-4.5, or Sigma 10-20 f4-5.6.
At this point I am probably 55/45 in favour of the Tamron because of the extra 4mm and the slightly faster f stop. Both lenses are the same price @ $450 from .
Any feedback on either one would be grateful to make up my mind once and for all. I want one of these lenses just for Landscapes. Cheers.