> <snip>

> 1. SMT assembly costs are usually less than through hole.

This would be true in the US. We are having this stuff manufactured
in China.  Labor is, for all practical purposes, free.  It costs them
MORE to do surface mount because they have to have a skilled operator
running an expensive machine, whereas to solder through hole stuff
they put "free" laborers in charge of soldering irons.   A laborer
makes about $80 US a month, working 6 days a week at 10 hours a day.
Ugh.  And people grouse about Nike.

> 2. SMT with smaller PCB size, packaging can be much less.

In our application, the packaging is going to be an appliance which
will be the same size regardless of the board size.

Hmm.  So far it looks like through hole is winning....