Thanks for the replies.
I'm scared of a couple of things.
- The bass response could be too big for my small room.
This is what the some guy from the Wharfedale website told me through email. He advised me the 9.4 since my room is smaller than 12 m2
- The internet vendor doesn't let me audition the model. The transporting fees are mine, even if I want to send the model back. Possible costs 50 euros.
Also the online brochure specifies the 9.5 to be used in rooms bigger than 12 m2.
Mine is 11 m2 so I have the feeling that it could be done.
I just don't want to take any risks, since it could cost me 50 euros at the end.