Power Armor that isn't faction based, mostly around the Brotherhood of Steel, is very hard to come by in Fallout New Vegas. Wearing faction based armor can have negative effects if you're traveling in the territory of a faction that doesn't like that faction, regardless of your standing with that faction. Now THAT's a mouthful! But, there is a suit of Enclave Remnant Power Armor laying at the crashed Enclave Vertibird. Check out this video for the location of the Power Armor!