try the ETH pinboard:
http://www.marktplatz.unizh.ch/index.cgi.
it's mostly offers for rooms in apartments, but also shorter or longer sublets (Untermiete) and regular rentals. Unfortunately, it's mostly in german.
I've found both the apartment I'm subletting now for 3 months (fully furnished) here (while I was still overseas), as well as the gorgeous 3 room apartment (for 1400 chf incl!) I'm moving into in April. Now that I found my place, I can spread the secret of this fabulous website...
I think 1500 chf is a reasonable price for a 2-2.5 room ap, especially since sublets are often cheaper than normal.
In terms of neighbourhood, there is quite a few that match your description: Wipkingen, Wiedikon, Altstetten (?), Oerlikon, Seefeld, Wollishofen, Albisrieden, ...
hope this helps and good luck,
v.