We've gone direct through Disney, but we're having a Wishes wedding and you can't book them through Virgin anyway.
Even if we'd have had an Escape, we'd have still booked through Disney. Some brides have had good experiences with travel companies, others have said they regret not going straight with Disney. If you book direct, then you cut out the middle man - you'll be able to deal directly with your coordinator and upgrade your options much more easily, as well as get straight answers to your questions.
Congratulations!