Based on my research and the feedback from others, the 75-150mm f/3.5 and the 50mm f/1.8 Series E lenses were the top two performing Series E lenses. Since the 28mm f/2.8 Series E did not perform as well as the 28mm f/2.8 AIS, I purchased the AIS.

I have been very happy with my decision.

http://www.flickr.com/photos/11336821@N00/6179456359/