I am now struggling with how and when to replace our 2007 View 23B (bunk beds and no slide out).  At the Grand Marais Rally in 2013 the Winnebago rep showed us photos of the Viva-Trend. I was not impressed since it didn't have a diesel engine. I figured that Winnebago would have to bring out a diesel version. However, after a test drive last week in a 23L I am not so sure there will be a diesel version. I have done some research and wrote a rather lengthy white paper in PDF format you can download here.