I have no reason to get a passport card. In addition to NEXUS/GE, I also happen to have a New York State EDL. Got that when I moved my license from MA to NY since at the time CBSA required you to carry supplemental proof of nationality along with your NEXUS card to enter Canada... it was much more convenient than bringing my passport. The rules changed in 2010 or 2011, and now a NEXUS card by itself is acceptable into Canada so I probably won't be paying for another EDL when my license is up for renewal in 2014.