We have just returned from Berlin and had a brilliant time, staying at the Hotel Askanischer Hof at the Ku'damm which we loved. As we want to return to Berlin on a more frequent basis (and have vague plans to retire there in many years' time!), we are now looking for somewhere slightly cheaper to stay, preferably nr Savigny Platz. A pension/B&B type place would be fine as long as it is clean and friendly! Any suggestions?