Lots of great advice already. Nikon has had a crop-only 35mm f/1.8 for $200 for a while now with good image qualtiy. Hopefully Canon will release an EF-S 35mm f/1.8 to match it someday, I think it would pretty well for you. In the mean time, I think the Sigma 30mm f/1.4 is a great choice; Autofocus Micro-Adjust will help if you get one that