consider the sigma 30mm f1.4, this is a lens that many like, esp on a crop body, field of view ends up at 42mm, close to 50mm normal, gives a fast prime for dark rides, or save until you can get a used canon 10-22, that is a very underated lens, more than one shooter has stated that if it wasn't ef-s, it would deserve a red ring, and the L letter. i loved mine, i only let it go when i gave my rebel xti to my mother this year. gave her all my ef-s mount glass, as my next light weight travel system will be a micro 4/3 setup