Had 2007 XC500 and sold them as the bushing had play from new. got a reply from Marzocchi that it needs to be like that to allow the stanchions to move, never had so much play in any other fork and they worked better than the XC500. I got a Marzocchi as my old coil MX Comp was great.
Its on my mates bike, works fine for him as hes not bother by the play (as its not getting any worse).
As for 2008 forks the quality was even worse than 2007 so assuming that xc700 was the daddy of the lineup with all the bells and whistles than there`s a lot of things to go wrong 🙂 And I had problems with Doppio Air on my old Marathons S, the negative chamber was letting air out making the fork small bump sensitivity nonexistent.
I will wait till 2010 lineup and stay from Marzocchi for now.