I have using the 50 summilux as my only lens for the last 3 months. It is truly an amazing lens.
I would like to know a couple of things before i get to your question. Do you like photos with f1.4 at all? I would like to know if you are taking photos at f1.4 because your lens has that option or you purchased that lens to take photos at f1.4 extensively.
Once you answer this question, things become simpler. If you imply the former, you should try to move to summicron (smaller, weighs less, etc) and be happy. If you imply the latter, you should persevere with 50 summil