Fifth Ave Perfection    Overlooking Central Park from all major rooms, including bathrooms, this, triple-mint 3 bedroom 3 bath apartment has been lovingly renovated to create an elegant yet comfortable modern home with abundant closets and storage space.    The bedroom wing, living areas as well as kitchen and staff areas, are accessed by a fabulous gallery nearly 36 feet long by 8 feet wide. The prewar accents have been preserved throughout: beautiful herringbone floors, crown moldings, nearly 10" beamed ceilings.    The loft-like open floor plan of the living room, with wood burning fireplace, and dining room, creates an inviting 49 foot entertaining space with western park views and eastern exposure.    The large eat-in-kitchen with 2 windows has all top of the line appliances, and a center island and a custom-vented grill top stove. The staff room has been converted into a large laundry room with full size vented washer and dryer and closets.    Two-zone central air conditioning throughout and extensive built-in millwork are additional attributes to this beautifully.