Actually, the way power armor works isn't capable for what you are asking. As power is a "movement-assisted" armor and requires the entire suit be there for powered use. The NCR even have what is called "NCR Salvaged Power Armor" which has less functionality and restricted movement due to it's salvaged construction. I would say something simple, either Leather or a simple metal armor set. Anything mid tier really, as the spectrum is very wide for high-tier/power-tier armors. That and the likely hood of getting Power Armor in this setting of the Fallout Universe will be more unlikely then the others, though it may pop up at some point in time much later.