I wouldn't go smaller than a 140.
The Never Summer Pandora is awesome - soft board, but damp enough to handle chop. Has VarioGrip edges for the ice. Roxy Ally is a decent suggestion as well.
The Pandora seemed like a good board but my g/f is having a tough time with the 80s zebra-y graphic from this year's model.
We looked for a 2011 one (awesome graphic) but no luck.
We were also considering some GNU or Roxy board for the BTX feature (I love my GNU CC). More specifically the GNU B-Street or B-Nice and the Roxy Ollie Pop although they seem to be more park oriented. Any thought on those?