Not searching for a 5th wheel, but Class A, and window placement is Most Important to me. I want a view out on My patio, not the hookups or a neighbor's patio, but my own. So many Class A's seem to have kitchens on curb side and views out the back side (other than from cab area). I just can't imagine buying an RV that doesn't look out on your own patio.
2010 F150 w/5.4
2011 JayFlight 24RKS TT
Our 2007 Itasca Horizon 40FD has 3 large vertical windows on the curb side mid-ships. Long window above the couch on the street side, plus an array if curb side windows in the slides themselves. That and maple real wood makes the interior bright.
%r we just bought has lots of curb side windows, a requirement for us.