One of the most ambitious (and expensive) condominium conversions in Manhattan real estate history, The Sheffield has emerged as a bona fide success story among NYC condos -- and as one of the most sought-after condo listings in Midtown Manhattan. While The Sheffield's prime Midtown West location gave it a leg up -- at 322 West 57th Street, The Sheffield is convenient to just about everything that makes Midtown Manhattan Midtown Manhattan -- this is one blockbuster new condo listing whose success isn't hard to figure.

The Adagio 60 on 243 West 60th Street is located in Lincoln Square, an artistic center of Manhattan that offers Lincoln Center, Carnegie Hall, and a collection of museums, not to mention all the shops, bars, and restaurants that a local could ask for. This luxury Manhattan condo building, built in 2007, boasts 41 condos for sale in 9 stories, and an array of amenities, including an indoor pool and a fitness center. Residents of Adagio 60 are treated to luxurious condos, and a support staff that is eager to help.

The Rushmore, located at 80 Riverside Boulevard, is a condominium building on Manhattan's Upper West Side, but also something of a world unto itself. Few NYC condos can match the full-spectrum luxury of the condominiums for sale at The Rushmore, and the wide array of apartment floor plans and available finishes allow owners to customize their living spaces to an extraordinary degree. There's more than luxurious apartments for sale going on here, though. The Rushmore's stellar amenities include an ultra-modern fitness center complete with indoor pool and a host of hotel-style conveniences.

The Element Condominium, at 555 West 59th Street, is a new luxury condominium building located on a comparatively new stretch of Manhattan's Upper West Side, but it's also more than that. In the booming Upper West Side neighborhood west of Columbus Circle, The Element has emerged as a strikingly modern condo and a blockbuster success.