We own a 2006 Affinity 730 with 39,000 miles. It is beautiful and we love it, but we are thinking about selling it and purchasing the Entegra 45 Cornerstone. Does anyone have any experience with this model? We looked at the Tiffin Allegro Bus 45 and the "cost price" is approximately $130,000. more for a Cornerstone. We realize the Cornerstone has a 600 hp engine, but are not sure that is really necessary?