Sorry, I forgot about this board! This is probably of no use to you now, but for future generations:
The two best places were Gibson Dunn (Waldorf) and Boies (Hotel Benjamin--a swanky corner suite!). SullCrom put people at the Tribeca Grand. Wilkie used the Time, which was kind of lame... I know other firms have put people there too (Cravath, I think). Latham used the east side W, which is convenient to their office but very small.
The best travel agency is Lawyer's Travel, which many of the firms used. They're friendly and responsive.