I had a blue fat DS for about 3 years until the hinge tore apart. I replaced it with a red/black DS Lite. I don't have the money (well, I do now) to buy every damn handheld Nintendo releases.
I will definitely buy a 3DS, though. Professor Layton vs Ace Attorney and Ocarina of Time 3D sold me.
I'm gonna get some serious flack for that. Doesn't matter to me; that's the funniest picture I've seen in weeks.