My kit lens has given up the ghost and its landscape season for me so i cant decide on the 17-40L or getting both the sigma 10-20 and 17-70 for about the same price??
I love the idea of the canon but the extra width of the 10-20 appeals to me too and i've read a lot of good things about both of the sigmas on here.
My only niggle is im thinking of upgrading to a full frame body next year and apparently i wont be able to use the sigmas for this???
Heelp me!!!

so i might even be able to stretch to the 17-40 and the 10-20 if i look in the right places... hmmm
