Which version of atv2's iOS is best for xbmc

Hi all, I have been happily enjoying running xbmc on my Apple TV 3.

I am thinking of updating the os to gain more featurs. However, I am worried about xbmc's performance with a new os.

I painstaking jail broke my original iOS version of my atv2.

I purposely haven't upgraded my iOS version because I had heard that the earlier os versions works best with xbmc. Now the os on my atv2 is the first iteration of iOS available for the atv2.

If I were to upgrade the os to the newest version. for instance, I would gain a lot of features like Hulu plus and Netflix subs.

However, I would like to know if there would be any performance hits to xbmc at all if I were to upgrade to the latest version?

Thanks