Hi,
N3i Spot watch is no longer in production. You can probably still get one on ebay.
X-lander still uses
Suunto's legendary
Vector internal components - they have stood the test of time. The watch however, is large, and the interface is old school.
Suunto's 6 line has a more cell-phone type interface. I wear an
observer - I love the old school interface, same legendary insides, but the
observer line is smaller then the
xlander.
The
Core is the new line - the first ones to be produced in China. The initial version were a bit buggy, but they seemed to have fixed those issues. Smaller and sleeker then the
xlander, and a more watch type interface then the 6 series.
Hope that helps.