I skipped straight to the 16-55, but strongly considered the 18-55 first, before going all in. here's one overview I came across while looking.
http://www.fujivsfuji.com/16-55mm-f2pt8-vs-18-55mm-f2pt8-4-vs-18-135mm-f3pt5-5pt6
I came from nikon (D300) and my favorite lens was the 16-35, and also made good use of the old 28-70, so for me its like Fuji mashed my two most used lenses together!