Dibs on the 50mm f/1.4. I've read reviews and it's highly recommended. Para kasing laruan ang f/1.8 version kahit konti lang ang stop difference.
You might consider the 85mm 1.8 din, better bokeh, faster AF and better build quality. Might be too tight for a crop though, unless used for portraits.
Sigmas 50mm is better than cannons.. tried them both ganda ng BOKEHHHH!!!!
sa reviews mabagal naman AF, pero for me ok lang
If your going for the 50mm range siggy ka na lang, free lenshood na rin and lensbag which will cost almost the same with canon when you buy a lens hood for it.
Kung nakacrop body ka at feelinf mo tight pa rin yung 50mm at 85mm.. check siggys 30mm 1.4. Good reviews too.