Just been using a S2 for a while and love that 1:1 viewfinder. Picked up a couple of lenses (here) the 50mm 1.4 and 28mm 3.5, both of which are excellent. Also have the CV 50mm 2.5 which is really superb. The Nikon is not quite as sweet as a good Contax, but still a really solid camera, great to use, except that stupid finger wheel that they copied from the Contax.
Unfortunately they are more expensive than even the Contaxes, which is a shame as they are still great users.