Apartment for rent - Röschibachstrasse, 8037 Zürich

I live in a very nice, relatively spacious (about 60 square meters) 2-room apartment in Wipkingen, just below the Röschibachplatz. There are public transport connections all around (Wipkingen train station, Wipkingerplatz, Rosengartenstrasse are all within a short walking distance). The Rosengartenstrasse is audible with open windows, but it has never bothered me. Since I have had twins, I need more space and am looking for something bigger. Preferably in Wipkingen or in district 5.