yes the 733 is better becouse of faster bus and it is also not overclocked to much so it will not fail as fast as the 800, its a reason why acube stop selling these 800 you know..
well here's Acubes response to my email regarding which system is faster:
"Hello,
It all depends on what action you do. Sometimes the 800 is faster, sometimes it's not.
But if you compare the 2 boards on many tests, you'll find the 800 a bit faster.
And I'm sure you won't regret your purchase
--
Best Regards,
ACube Systems s.r.l
www.acube-systems.biz"