Help with Zeiss 24mm!

You seem to be doing quite well.

I'll give the old advice to walk around with your zoom at 24mm (a rubber band can help keep it in place) and make sure you are comfortable with the focal length and prime shooting technique, then you can decide whether the increased image quality and extra speed will be worth it to you.

You should also try with your lens at 35mm. The SEL 35mm seems like a nice lens and I'm considering it for my Nex bag as well.