I'd sub simcoe, centennial, cascades, ... for the EKGs but it will be good. See the recipe in my dropdown, it's pretty close to what you're doing but I do all grain with maris otter so mine is a little more biscuity than yours will be (appropriate if you are going for the IPA style vs a more balanced pale ale).
Malts look good, but I'd use Centennial instead of the Columbus, and Cascade for the EKGs. Centennial would go better with the Amarillo since Columbus is more on the spicy side of things. EKGs are too soft and floral for an American IPA in my opinion.