NU tuition

I just got my results back from the ACT and I scored a 30 overall. I am interested in engineering at Northwestern and I am wondering if I could realistically get into the school if I applied ED. I have pretty strong extracurruculars and multiple leadership positions. I am also top 5% of my class, with a 4.1 weighted GPA and 4.0 as of now, give or take. I scored a 34 on the math and english section of the test and I have scored higher on science and english on my previous attempts. I realize it may be a reach but I love the school and I know acceptance is much higher through ED. How good are my chances? And what is your advice/ evaluation?