So im in a tuff spot and dont know what to do. My current lens are. oly 45mm 1.8 oly 17mm 2.8 ver.1, kit zoom 12-50, oly 75-300mm, oly 9-18. I find my self using the 45mm a lot for low light performance but were im using it is a little long on the focal length to use in tight spaces. and lately i been shooting a lot of band concerts locally trying to get practice and to one day make some nice side money off of it. I find myself a lot of the times wanting a zoom when im in the field because i cant adjusted my position to get a better shot(aka mosh pit right behind you). I recently in the last two weeks learned about the Panasonic 35-100 and 12-35 with constant ap. of 2.8. And im been thinking of almost selling all my current lens to get one of the Panasonic lens and get the other one when i get some money flowing. Frankly i am confused on what i should do. if i have missed anything or you have questions feel free to post so i can help you to help me.