Should I ever start a second NV playthrough (likely), I intend to take the Cowboy perk.
To keep my appearance a bit in line, which armours fit well, aesthetically? I don't want to wear Power Armour with those weapons.
I suppose the Sheriffs Duster and Sheriffs Hat (found in the Sheriffs residence in Primm) are the obvious choices. If you want something a bit heavier duty, the Riot Gear from Lonesome Road look like dusters as well.