Product Reccomendations

ckeagen:
I'm building an LED suit using approximately 150 - 200 5V WS2812B 5050 RGB addressable LED's.

I'd like to be able to control the lights in 4 banks, 6 would be better but at least 4 and also have the ability to wire in three external buttons, power along with a previous and next button.

Also I want to be able to power the board using an external power supply, I don't want to have to power it through a USB or mini date transfer cable. If I can do that wiring in the power button should be a snap.

What is the most compact Arduino that can do all of that plus be able to power the 150-200 LED's?

Does anyone recommend using a shield or an LED driver?

Thanks in advance for any advice.

Chris (Newbie)

since the LED's are addressable via a serial out, I believe the Digispark is the most compact.