Here's the changes I'd make:
1. Change the bittering addition to something else to save the Amarillo for what it's truly good at: Aroma/flavor. (I'd use something like Columbus, Magnum, etc)
2. Take the 1oz of Amarillo you would save and add half to the 20 minute and the 5 minute.
3. Save the Citra for another beer, Simcoe/Amarillo is a great combo on it's own, and since you'd only have KO and Dry Hop additions, I'd personally skip it. If you must keep the Citra in it, I'd split it between 20 and 5 minute additions and keep the dry hop.
Just my two pennies. The malt bill looks good. What yeast are you going to use?