Double or single column newsletter format ?

One of my first actions when made Master of Devotion was to appoint a new Newsletter Editor.
Stephen and I have always have a healthy (and often fun) debate about the best way to present pages in the newsletter... in double or single column format.. and I thought it might be interesting to see what readers think - here is your chance to express a view (and hopefully prove me right.. but I am not telling you which one I prefer - I would hate to prejudice you :)
Scroll down below the sample images to vote.

Single Column Layout


 Double Column Layout


Columns in Newsletters...