I think it looks great!
You definitely want to put your best books where they are going to garner the most attention and make you look the most sophisticated and having the philosophy books right in the middle seems like your best bet, but I would switch trade paper backs with Encyclopedias and absolute editions with History books.
Speaking of philosophy, what have you read? I have read quite a bit in my life (alot of time on my hands) I'd have to say my favorite philosopher has to be Frederich Nietzsche, maybe followed by Sartre or Descarte, I'm a pure existentialist, more on the side of Atheism (Why I enjoy Nietzsche so much) but Descarte was quite captivating to. I did enjoy Critique of Pure reason and how it transformed western philosophy.
Regarding history I loved Eisenhower's Crusade in Europe, touching how he said "We fought the wrong enemy" In reference to the war to come (At least in a cold war sense) with the Soviet Union. Have you ever read "The Decline and Fall of the Roman Empire" By Edward Gibbon? (Very Good)