Today I finally bought a Nintendo DS; I was waiting for a new color besides white and so I snatched up an Onyx DS Lite.
I have to say that I am very pleased so far with the experience. The system itself has excellent lighting, excellent sound, is the right size, and I love the dual screens. I never thought the two screen deal was very useful, but seeing how it is utilized, I am impressed.
When Mario goes down the pipe, he goes to the bottom screen. Genius! And with Brain Age, the sideways presentation is like a book.
It's the first handheld I've bought since the Game Boy Color, and things have definitely come along way since 1998.
Updated system list = NES, Genesis, N64, PS, GBC, PC, DreamCast, PS2, DS