I have a white regular 3DS (for cycling and other helpful stuff) and the AC-themed XL. I guess I got lucky with the AC one since it has nice, neutral screens, my old silver/black XL had those awful yellow-tinted screens. 

I have the silver and black 3DS XL. I would have liked the new pink one if it was available at the time.
I also have a red and black one from America to play games that weren't released in Europe.