So I currently have my OM-D with the Sigma 19mm and the kit 12-50mm. I do street photography and more mainly into street portraits. Debating between the Sigma 30mm and the Olympus 45mm. It seems the Oly 45mm is the better choice here judging by posts around the forum but I'm still unsure. Now to throw a curveball (sorry!) the other one that is interesting me is the Rokinon 7.5mm which I think could be used to get some very interesting street photographs... Thoughts between the 3 judging by my curent setup and interests? Thanks in advance!