Hello Daniele,
welcome to the forum. I have the same scope and have been asking myself the same question. After reading a lot in the forum, I have realised that there is no simple answer to that question. Just too many options of cameras and adaptors available.
Swarovski has a list of recommended cameras, maybe you start there.
http://www.swarovskioptik.at/upload/media/media/54/Kameraliste_recommended_April2012_1[3309].pdf
The forum here has a lot of info, but it takes some time to read through it.
I myself have now ordered a used Canon S95 compact camera, which is thought to be one of the best for digiscoping (current models are S100 and S110).
Regards, Florian