As an alternative to an Arduino Nano, Uno, or Mega, you can use a Raspberry Pi, a PSoC, a Teensy 3.2, an XLR8, or a ShieldBuddy to control your NeoPixel applications. As an alternative to an Arduino ...

So you've already outgrown Arduino's most beginner-friendly board, the Uno, and are looking to move on to bigger, more exciting projects. In that case, the Nano family might just be what you need.