Many laptops have backlit keyboards.
Mine has one, its the Toshiba Z835-00G Portege (Ultrabook).
I do like it, however, it isn't something that would be a deciding factor for me, just an added benefit.
As for $700 range, I don't know what would be best, although, I do tend to recommend ultrabooks. Lighter, often better battery life, quieter, faster start up. Only a few drawbacks, small hard drive (I bought a 1TB portable hard drive, and even if I bring that with me, the total weight is less than ordinary laptops), and of course price, but they're getting better in value every day it seems.