I found a couple more "first drive" reviews of the 28i that I haven't seen mentioned yet. The first two are pretty good reviews...the first one also has a lot of pictures:
BMW Blog
http://www.bmwblog.com/2011/09/06/fi...-z4-sdrive28i/
Kilometer Magazine
http://www.kilometermagazine.com/art...MW_Z4_28i.html
Road & Track
http://www.roadandtrack.com/tests/drives/2012-bmw-z4
Motor Authority
http://www.motorauthority.com/news/1...8i-first-drive
The last one is more of a mini review:
Autoweek
http://www.autoweek.com/article/2011...IEWS/110819904