Exchange my apartment with apartment in Barcelona

Hi,
I would like to exchange my apartment in Paris against an apartment in Barcelona for the summer 09 ( july or august). My apartment is a large studio (35 sq/m) with a separate hallway and a large balcony (20 sq/m). Separate kichen. Situated in the 7 district. Very quiet. Very nice and confortable place in a beautiful neighborhood. Large TV LCD + cable TV. Nice bathroom. Large closets. Separate toilet.
I pay 1000 Euros/month for rent. I would like the equivalent in Barcelona for July or August 09.
Could send photos.
Thank you for your answers.
Eric