An uncommon opportunity.    Exciting high floor, serene and harmonious,  5 room  apartment in a coveted upper west side pre-war building with sweeping vistas of the Hudson River to the George Washington Bridge and beyond.   Views to the north, west and east.  Two bedrooms, 2 bathrooms, a formal dining room, hard wood floors, high ceilings, and crown moldings in approximately 1,500 SF of gracious living beckon the discerning urban dweller with an penchant for elegant proportion and the panorama of a river and the city . The kitchen is windowed and eat-in.  W/D are allowed.  This is a SPONSOR apartment with no board approval.  Situated three blocks from the #1 subway, a block from the Broadway bus and in a vibrant area with wonderful shops and restaurants, 340 Riverside Drive is on a quiet double street with full service.   There is a capital assessment in place until January 2015 of $2,600 payable in two installments in October and January.