sevenfoldtg, why do you think Lopez is less formal than these loafers? I have two pairs and they are dead-classic in my eyes, they can go well even with the suit, although I never wear them with a suit ..
Parisian Brown is the prettiest looking John Lobb brown in my book. Not too screamy like the New Gold might be, yet not too dark as dark brown museum might be. A perfect shade balance IMO.