I want to buy a folding bike. I had a regular bike for 2 years now, I bought it for the commute to work. But I barely used it a few times because it's hard to fit it in the elevator

And also a lot of high-end bikes were stolen at my workplace

So I sold it.
I really like the Bromptons. The folded size is very important to me and I really like the look of it. I know it has old "tech" but I don't really mind.
I am thinking about a M6L. The Brompton shop I contacted said they will receive a new Black-Edition in March, 2015. It will be available in Black, White, Lime Green, Lagoon Blue and Berry Crush.
I want the 6 speed because I have a hill on my commute and my legs are not so strong yet

I may even get the -12%.
What do you guys think about new Black-Edition? Do you like it more than the classic? Is it the first black edition that Brompton has done?
Should I get the rack on the back or put a bag on the front? Which is better?
Also do you know if there is any other difference between the 2014 and 2015 models?