Interior Living on 42nd ave has some decent stuff. Some of it is expensive, but not all of it is.
We've been looking for a couch on and off for a couple of years (just havent had the desire to actually spend the money yet). Oddly enough Sofa Land wasn't near as cheezy a place as I expected it to be upon first glance. Lots of selection.
If you have crazy F-U money, or are very eccentric, go to Roche Bobois, Luxuries of Europe, or Domaine and see how you can spend tens of thousands on a couch