26 years old professional looking for flat

Hi,
My name is Jarek and I'm 26 years old professional working in film industry. Currently I live and work in London, but I'm moving to Berlin in few weeks and I will be working there for about 3 months.
I am looking for a studio/1 bed apartment (for 1-3 months) starting from 29th August, prefferably in Kreuzberg/Neukolln /Fschain area (however I'll be happy to hear about flats at different locations as well).
I'll be spending most of the time at work, and I'm looking for some place to enjoy rest of my time in the city :)
I'm extremely tidy, non-smoking and I always treat someone's flat as if it's my own.
Ideally, I'd rent a studio or 1 bed flat with fully equipped kitchen and wi-fi or broadband access.
Please let me know if you have any other questions regarding myself or my stay, or you've got some place to which fits the description ;)
Cheers,
Jarek