If you don't want to go with .45, go with the CZ. I have shot several 1911s in 9mm, and reliability has always been lacking. For critical situations, stick with what the gun was designed for - the 1911 was designed for .45, and the CZ was designed for 9mm.
i very much agree with this, SOMEWHAT. The P-06 and the 2013 and newer 97B will do just fine in "critical situations."