Black Design package would be quite important to me (personally). I would see if you could somehow negotiate with your dealer for them to get the black pack retrofitted.
I basically did a bastardized black pack myself from eBay (authentic LR parts though). I bought the black lettering "Land Rover" for the hood, black lettering "Discovery 4" for the rear, removed the other V8 and SE lettering, bought black grille and side vents. I have Compomotive wheels, so that was one thing less to worry about. The only thing missing is the black mirror caps and black door handles.
Close enough for me.
I did the same thing on my 2011 and it worked out fine; however, I definitely wanted the black-design pack on my 2013. I had the wheels powder coated, grill painted, got the black vents, and changed out all the lettering. It was pretty easy and less than the cost of the black-design pack, but I never got around to doing the door handles or mirros.
I really like the look of my Fuji White with the black trim, especially with all my black/metal modifications. I love the Corris Grey color, and may have gone with that if it was available when I ordered my LR4, but for me, white is the best option because it reflects the sun (important for me now until I move) and I did not want metallic paint at all. I wanted to be able to easily touch up and hide scratches and the Fuji White is phenominal at hiding brush scratches. The second month I had my LR4 I went off roading and a huge live oak branch scraped the side of my truck, but you would never know after a washing and wax job. Sure, if you look at it in a certain angle in the sunlight you can see it, but still, it looks new.
I am sure in a couple years my LR4 will look like it went through a war. LOL! :-D