Citra and Amarillo seem to play well together. I kegged a pale yesterday that used those two for flavor/aroma. Citrusy, kind of like grapefruit, is how the sample tasted.
You can simplify that late-in-the-boil citra/amarillo hop schedule next time if you want to make life a bit easier. An ounce of each @ 10 and the same at 0 will give you the same sort of character.
Good Temp Control -----> Happy Yeast ------> Tasty Brew