I would get the better Elite 130 between those two.. But depending on your budget and the components you'll be using there are smaller cases like the lian li PC-tu 100 and the Silverstone SG05, SG13.

The CM Elite 120 Advance is O.K. It's not so small & not so big (just right) for an m-ITX case. What I hate about it is the protruding PSU bracket at the back of the case. I'll proprobably get the NCASE M1 if I can find a cheaper one here in USA.