I think that sound like a fabulous combo! I have no experience with Anglo Arabs, but there are some nice traits in each breed that would probably turn out to die for when combined.
Of course I could see how the foal could get the "spirit" from both breeds and be a handful for someone who didn't realize what they were getting into. It sounds like you will have no problem with that though. After my VEEEERRRRY chilled out stallion(though I love him), I think it would be exciting to get such an animated breed.
It will be fun to see the baby in about a year :)