I've only got the 24-70L is my collection and am looking on aquiring a fast prime. I purchased the sigma 30mm f/1.4 but I didn't like it much (maybe i had a bad copy? the AF was loud and wasn't very accurate, normal?) I will probably pick up the tokina 11-16 f/2.8 when more reviews come out and the supply increases. How do the owners of this lens like it? good for portraits or is it too long on a cropped body?