I should clarify one thing here. If you think fenders, big tires, panniers or handlebar bags are important factors for the bike you want to ride on a brevet there is nothing wrong with that! Go for it! Just make sure the bike fits you. For you, that is a "randoneuring bike," awesome! Just don't bag on the guy who thinks an uber-light carbon wonder is his/her "randoneuring bike." If it gets you there it's a randoneuring bike.