2 Zimmer in Rixdorf gegen 2+ Zimmer

Ich suche nach einem Tausch meiner gemütlichen und günstigen Wohnung am Hertzbergplatz, Neukölln, gegen eine größere Wohnung. It's a calm backhouse apartment on Hertzbergplatz. 62 square meters on 3rd floor. Warm rent is 765. M41 and 171 runs right outside the building, S Sonnenallee is 8 mins walking. U7 Karl Marx Str is 10 mins. 10 mins to reach the canal. I'd like to find a bigger apartment since as you can see I can barely fit in :-) Looking for a flat with easy public transportation inside the ring, that is bigger, bright with high ceilings, balcony and preferably wooden floors. Populated areas of Kreuzberg, Neukölln, Friedrichshain, Mitte, Prenzlauerberg would be preferred but I am open to exploring different options.