LED Strip Power

[BryceKarlins]

Hello! I'm doing some blingification with Adafruit Neopixels this year, and I'm trying to find out the best way to power them. Because FIRST locked down the other 5V 2A port from the VRM, I see a couple good options. There's the BEC converter from the old control system that powered the radio, of which we have PLENTY to spare. There's also a small UBEC I got for another project a while ago.
Does anyone else see other options?

BTW: Neopixel strips need a relatively clean 5V, and anything over 6V will fry the whole strip instantly. Also, I'm using 4 meters, which should have a max current draw of ~8 amps (all LEDs on full white 100% brightness). I plan on using only 1/3 of that regularly, but don't what to fry anything if we accidentally use more than we expect.

I guess I just want some thoughts and suggestions. Thanks!