Which two are those?
For me, I had a ton of carded figures I was saving/not opening, including the Batman movie series, All the SW stuff, Kinnikuman, and several odd ones like a Japanese soccer player and singer. I had all my others in cases, and every time I looked at my case display, I missed seeing the others, since they were some of my favorites. I didn't want to maintain two different types of displays and so I opened all my carded figures. The first one was a bit difficult but once I cased them all, I was happy I did it.
Having said that, I do still retain one figure on card: the Indiana Jones that came with the watch from last year. I just like the card that much.