Here is a comparison between different pieces of slicing software:
https://www.youtube.com/watch?v=USA29CuYOvk#t=839.801
From there, you will find links to other videos on the subject.
I am using Slic3r, but have never managed to get supports working satisfactorily. I will try to reduce the distance as suggested, but suspect they will be still harder to remove...
![Rolling Eyes :roll:](./images/smilies/icon_rolleyes.gif)
Cheers,
/Chris