This was exactly my experience with amarillo in my IPA. I really liked the very subtle citrusy tangerine component they added.Dryhopping helps to increase the hop aroma in your beer. I have dry hopped with amarillo in my pale ale and they are a nice flavor/aroma hop. They have a strong citrus component, but unlike cascade they lean more toward orange than grapefruit
I haven't given it a taste yet, but I think others have done it. I've used Citra before, and like the tropical flavor I got from it. I mixed it with Centennial that time, and the two combined for a bit more of an "edge" to the bitterness than I really wanted. I'm thinking the Amarillo is a better match.Drinking a Mojo IPA (Boulder Beer) clone right now that has Amarillo for all late additions and DH. It's a great hop for American IPA's. Like others mentioned it has an distinctive tangerine aroma. Have some citra too, so may try this Citra/Amarillo combo.